A ReplayTV will stream to or from a PC with no probs. Tivo requires a lot of hacking to get that working.
I believe the combo DVD/Tivo has 80 hour recording time, making it a really good deal. I would love to be able to go to free 3 day listings, instead of the current $9.95 I pay per month. If you are home at least every 3 days then I don't see a need for 10-14 days of listings.
BTW I believe you get the full Tivo service "Tivo Plus" for the first 45 days free, as a teaser if you will.
I would consider DVI to be more important with a digital TV (i.e using DLP/LCD/LCOS tech). For a CRT tube that uses analog in the end, I don't see a real benefit to a digital connection. Component connections will be fine. One thing tho is that the upconverting DVD players (the ones that upconvert to 720p or 1080i) only send the upconvert signal over the DVI connection (and in many cases require HDCP). They won't send upconvert over the component output - for copyright protection purposes apparently.
So basically the lack of DVI depends on what you plan to hook up to it. The HD cable boxes etc still have component outputs, because the vast majority of the HD sets sold over the last few years don't have DVI. But the people with DVI and no HDCP are going to be screwed. So the moral of the story, either forget about DVI, or make sure that any DVI set also supports HDCP. For example the current series of Dell LCD TVs have DVI, but no HDCP support. Not that they advertise that mind you.
The only prob I can see with that Panny is that it only has one set of component inputs, if you are using that for your DVD/Tivo then you are going to have probs hooking up an HD source such as cable/DirecTV etc. Unless you get a receiver with component switching.