A very nice CDP dont go the upgrade route, though. This is too pricy. Also, if you are willing to buy used, you can get an Arcam FMJ CD-23 for approximately the same price. This is significantly better than the CD 73 even if you maxed it out with all the available upgrades (to CD 92 specs) at a cost of over $1200 in addition to the original $800. An FMJ CD-33 is sometimes sold for less than $1150 used, and this is really an entirely different class of player than the CD 73.
If you are setting up your two-channel audio any where near a TV in your house, I would suggest you go for a DVD 78. The audio on these is very close to as good as the CD73, and the video playback is unmatched in the price range ($999 list, less used). I was absolutely floored by what it did for me DVDs, as was my wife.