Are you looking for something that can upconvert to 1080i? Or just a player that has exceptional 480p output?
I recently got the Pioneer DV-578A for my 55" Mits HD RPTV. Outputs in 480i/480p. It was selling for $141 at Best Buy. It replaced a Panny CP-72. The picture from the Pioneer looks so much better. I'm very happy with the purchase.
If you want something that upconverts to 1080i then please disregard.
I use the Zenith DVB-318, available for $160 at some sources. I think it is the greatest thing since sliced bread at 1080i for me. The problem is 4:3 format stuff, just real tough to deal with on it for a lot of HDTV's.
For anything widescreen it is quite good. A lot of people I know that use component video have either already gt theirs or they are ordering one, after see'n it in action on my setup. One of those used a higher end Denon player too.
The Denon 2910 at $679 MSRP(can get it discounted I'm sure) would seem to fit the bill. 8mb buffer for layer changes, SACD, DVD Audio, Upconverts to 720p and 1080I via DVI/HDMI, Faroudja Deinterlacer, amongst other features...