B-2, I'm no Yamaha expert, but I think ojom (not EvanG, oops) snagged a 1110, not a 1100. I think the 1110 is 8x oversampling (second gen), while the 1100 was 4x (first gen).
Evan, every CDP consists of a transport, which spins and reads the CD, and a "digital to analog converter", or DAC, which changes the 1s and 0s into a normal audio signal. There has been very little progress in transports, but enormous progress in DACs.
Yes, the best place to buy one would be eBay. You won't get a good one for as little as you snagged that 450, but the difference in performance will be immense. The key things to look for are bits (you want 24) and speed (you want 192), usually expressed as 24/192. They're becoming very common, so be patient.
Ojom, the fact that the 1110 is second gen means that you're not suffering much while you wait. A first gen unit would be tough to listen to for very long.