As Ravi said, so long as your stream is digital, an expensive player won't transmit the binary stream any better. It's a fairly mindless engineering problem to discern two voltage levels in a binary stream.
In reply to:
The one thing I didn't like about using my computer was the noise issue. Computers run much louder than a CD or DVD player. Try placing the computer as far away from your listening position as possible. Isolate it. Or get a really good noise proof casing.
Additionally, if you didn't build your own machine, you likely have very obnoxious cooling going on. To quiet down the machine, you can replace the internal fans with a better product like Pabst or Panaflo. The Panaflo L1A doesn't churn out a massive amount of air, but it's VERY quiet for the air it moves.
Zalman makes a series of passive coolers as well. At the very least, replacing your video card's little whiner with a passive heat pump will cut down sound dramatically. They also make a very quiet CPU cooler, but an Alpha or SK-800 and a Panaflo are pretty hard to hear too.
The cheap POS power supplies in most mass produced computers suck too. Replacing yours with an Antec True Power series PSU will cut down almost ALL of the sound from the power unit. They're that quiet.
Lastly, the ultimate move in sound elimination is to go with a water cooled setup. There are decent kits available and the only sound you wind up with is the pump (good ones are pretty quiet) and the 120mm fan that cools the radiator. They are very hard to hear if done properly, though a water cooling kit usually costs you around $200.
