It has all sorts of problems, on which I won't comment here until I test drive the Win7 version.
G'Day Judy,
I was in the same situation as you, although with a few less Toppies to manage! I just had a TF6000PVRt and TEDS Suite running on an old laptop connected to it. It worked fine, but I was getting a lot of grief about not being able to receive HD channels, especially as there was a cheap set top box out in the back room connected to an old 30" Sony CRT TV that could receive HD!
Anyway, you will find that WMC on Windows 7 does work a bit better than on XP, but it doesn't do much more. I built a new HTPC on Windows 7 (didn't like the idea of Windows 8 yet, as the choice of add-on bits is limited and untested for a HTPC) and ran WMC for a while. For TV alone it worked okay, but I wanted a better Media Centre than WMC could provide. So I looked around at XMBC, Media Portal, Plex, Media Browser ( 2 and the fledgling 3), J River Media Center, Media Monkey, Argus TV, NextPVR, and others I don't remember.
I picked "J River Media Center" as it provides Live TV and Recording, EPG, and TV Show, Movie, Video, Image and Music Media Server capabilities. It is not perfect. The documentation consists of a Wiki and the Forums, and leave quite a bit to be desired. But the CEO and CTO post on the forums and reply to questions, so access to the company is great. There is also a strong group of "Beta Testers" that hang around on the forums a lot. It reminds me of the old original Toppy forum in Australia, where you could actually get quality technical help when needed. JRMC also provides superior sound and video reproduction, having been developed for audiophiles. Lots of the stuff people have to muck around with in XBMC is already there is JRMC.
Mind you, while it works out of the box, it does require quite a bit of fiddling to get the best out of it, and match it to your amp, receiver, or other hardware capabilities. It is also very configurable, a part of it I am still grappling with. There is a steep learning curve.
It is far less capable than TEDS in managing recordings, but it will series and individual program record, and has global padding for recordings. It doesn't have keyword recording, but allows you to look through a whole list of TV Series it is aware of (from current and previous EPG data I think) and "Subscribe" to any of those.
I'm not sure if it will record two channels from one broadcast stream (Sister LCNs) yet, but I put a Quad Tuner Digital Now card into my HTPC, so the overlapping programs hasn't been an issue yet.

It also handles Time Shifting differently, which seems to give it an advantage. It will run a time shift buffer (set to four hours by default!) and a recording on the same channel in parallel. Neat! When you start a completed recording which has padding included, it start playing where it thinks the actual program should be, not at the start of the file. A little skipping forward or back, and it is easy to find the start of the program, if the station didn't start it on time. Excellent.

(Frankly, I'm not sure if it doesn't do that for an in-process recording as well. I think it might, rather than jumping to the Live TV position.) Still learning here. It may be more suited to a geeky person, or a determined one! But I think the company recognises a more consumer based, user friendly application is their future.
JRMC is a Media Server, so you can watch anything stored on it on any networked DLNA capable device on your network. I can manage he server from my PC in my office, set recordings, watch programs, move, edit file names, tag files, create play lists, start a program playing on the TV in my lounge, or stop it, or play a music play list. They have a web based remote, plus and Android app, some third party providers for other remote controllers. You can even manage your server away from home, or stream content to another location over the internet, and setup is pretty easy! I like the potential, even if it isn't all perfect yet.
I am using IceTV's EPG in XMLTV format via WebGet, which is what TEDS was doing as well. It works but I am still trying to work out my future with IceTV. There some options for getting EPG in Australia, but IceTV is still the best option I have seen. However, some of the nice features of IceTV, particularly the web based management of your TV viewing and IceTV Interactive, are under threat of being usurped by over the internet management of a JRMC server, if they get their act together and build better TV recording selection functionality.
Getting away from PVR firmware issues to normal PC BIOS and Windows issues is . . . Wonderful

Bottom line: You have been playing around with PVRs and TEDS as long as I have, based on how long I have seen you on forums, and you have been able to make them work. So if you have built a Windows 7 HTPC, do yourself a favour and have a look at J River Media Center.
http://www.jriver.com/ Take a long look, because they provide a 30 day trial, and you might need that long to be convinced. Enjoy.