Need Hardware/software Advice for new HTPC

I'm planning on getting my first HTPC and I want any/all feedback on what hardware/software I will need based on the following functionality I want it to have:


1. Tune in Satellite Feed (DirecTV) and record via HD on PC

2. Program guide to schedule recordings

3. Convert VHS tapes into digital mpeg 2 (via firewire)onto HD for archiving

4. Possibly stream video to other televisions (currently have 802.11b)


I've seen video capture cards, ati all-in-wonder, etc., and not sure what's needed, what's overkill, etc.


FYI:

- I'm interested in Windows MCE as the platform

- I don't plan to use PC for gaming, but want optimal video quality for TV recordings.


Thanks to all !