I use a Yamaha DVD-S1500 for DVD-Video, DVD-Audio, SACD, and CD. I haven't had a lot of time to compare things yet (barely got it hooked up last night), but I do have stereo analog cables run from the S1500 so I can compare analog bypass. A brief comparison between S1500's DAC and 990's DAC on CD left me thinking that the 990 had an edge on the S1500, but I'm not ready to call it definite yet. I'll try analog upsample, as well, when I get a minute.

If you're looking for a good DVD player, Denon has some good stuff in the middle and upper ends of their product line. There's also a new-comer (OPPO Digital OPDV971H) that scored really well on Secrets' tests, if you have an HDTV with a DVI or HDMI input - it's really only appropriate for a DVI or HDMI input, since the component outputs are limited to 480i. My Yamaha's picture quality is pretty good, although the Yamaha DVD player user interface (front panel display, remote, and such) is pretty dreadful.