Your ED display won't support higher than 480p resolution, so the upscaling players aren't going to be much benefit to you - you just need a good progressive scan player. Do you care about DVD-Audio and SACD? If not, then you can look at some quite good DVD players (which could double as CD transports) for just a couple hundred dollars. Maybe the Denon DVD-1720 or the Panasonic DVD-S77 (or even the Oppo, if your display has a DVI or HDMI input - it's main benefit is upscaling to HD resolutions, but you could set the DVI output to 480p for your plasma). Any of those would set you back around $200 or less.