Help a complete vidio idiot

Just a comment on the computer for DVD. Bad idea.
The output of the DVD from a computer may be jerky, poor optical quality (more so with a projector).
The sound will depend way too much on the audio card in the computer (if you spent $300 on self power speakers that might no matter, but you are going with $$$ stuff, you will regret the sound from a PC, no matter how it is output. (as coax, optical, digital, doesn't matter)
If it is for the family, get a five disk DVD machine, and look into progressive output, or what a line doubler could do for you.
make sure your receiver has DTS, and all that stuff.
A lot of folk do not like a center channel.. but make sure the Receiver can do all the adjusting of 5.1. or 6.1 or 7.1 channel balance and other attributes you may want, so it can be set to please.
Good luck.
You can attach a computer to you setup, just don't use it for DVD playback

On the CRT front, after the initial setup, you will need to revisit the convergence and possibly other settings roughly every 6 months. It can get a little tedious...

I`d go with Atlantic technology for all your home theater heeds.For $1700.00 you get P-2000 processor, for $1300.00 you get A-2000 amp . And for an additional $2800.00 you get their System270THX. Visit Atlantictechnology.com and take a look . I`m not a dealer nor affiliated in any way with this company :-). But of course there are many other options with your budget.

Thanks very much everyone for your comments. I can see this is going to be complicated