How To Teach A Old Home Theatre New Tricks

I am a Home Theatre Enthusiast on a budget. I've had essentially the same setup for going on 9 years. Audio is always priority to me over video. That said, I've made the leap to Blu-Ray via my Sony BDP-S550 and Hi -Res audio  (DVD-A & SACD) is still being played via my trusty 6 year old Pioneer DV-578A-S.

I'd like to get a projector one day to replace my gracefully aging Sony 53" 4:3 RPTV. Its picture as good as the day it arrived at my old home 9 years ago. Its been moved 3 times and still kicking video ass. How does 1080i look on this old RPTV ? Awesome. Not quite what you'd get on a 1080p projector but "good enough" for now. I do digital/analog audio via my 9 year old Denon AVR-1802/20 year old Adcom GFA-555II (for the front L & R channels). I do digital audio switching through its 75ohm video inputs and the single video out goes to the receivers only coax digital input. Works great. My HTPC is my aging 4 year old Celeron D, 1TB, Windows 7, 64 Bit machine with DD/DTS coax digital out and ATSC tuner. Its DVI output adapted to component out RCA connected to a Phillips video switcher that also switches the Pioneer and Sony component outs to my Sony RPTV's single "DTV" input. Get all that? 

The HTPC also acts as a music server that I can access through my laptop and play music out on my deck via my outdoor audio system. Most of my audio collection is ripped and streamed at the either Apple/Windows Lossless audio or 320mbps/128mbps AAC or mp3. 

With all the hype "surrounding" new HTPC receivers with HDMI audio/video switching and video upscaling (not upconverting). I get all these benefits via my Sony BDP-S550's rear panel 7.1 analog outputs and the Pioneer's 5.1 analog outputs and video is upscaled to 1080i on certain DVD's while others remain at their 480p unless one uses the HDMI output. Albeit via a rat's nest of cables, switches. When I do get a projector one day, I'll simply run one HDMI cable from the Blu-Ray to the projector, and I'm done. 

So for those of you who want the latest and greatest in A/V. Look no further than what you have and expand on it.