Nice speakers. The key weakness here is your old adcom amplifier. Your CD player has also been eclipsed by a rash of new and very sophisticated and great sounding models available for near a grand and up.
For mostly Rock music:
Idea 1. Naim Nait 5i integrated and CD 5i. Boogie, boogie, boogie. Not a ton of power, but all good foot taping watts - the latest and best entry level gear Naim has ever made.
Idea 2. Cambridge Audio Azur 840A v2 integrated amp and Azur 840C upsampling CD player. Plenty of power and a smooth CD player. Combination will play everything you throw at it well, but will have some extra fineness when required.
Idea 3. Buy an Odyssey Stratos Extreme stereo amplifier, keep your Adcom preamp and get a Rega Apollo CD player. Best amp listed here with both power and control - musical and defined CD player. This amp and cd player would probably pair well with your existing preamp and speakers.
Idea 3. Intriguing combination - Emotiva XPA-2 TWO CHANNEL AUDIO POWER AMPLIFIER, PrimaLuna ProLogue 3 tube preamplifier, NAD C 565BEE CD Player - or - Cambridge Audio Azur 740C CD player - or - Marantz SA8003 SACD-CD player.
Last combination is a wild card with the new product Emotiva amp pumping out a claimed 250W at 8 ohms that doubles power into 4 ohms. The thing weighs over 80 lbs.(!) and sells for $799(!!), uses decent parts and looks to have a quality build. PrimaLuna is a very high quality and trouble free pre that would add some tube glow to the blue hot muscle provided by the big amp. The trio of CD players listed are at the center of an outright war between English hifi companies to own this niche. They are all very good players and available for audition in most major markets. Who's winning this war? You.
Of course there are great amps and CD players coming available used all the time. If you could get a Musical Fidelity A5 integrated amp and the sister CD player combination in your price range, that would be great. Wadia makes nice CD players and anything from Plinius is worth checking out.
