Paid a bit too much for a Citation II...

Hi,
I'm new to the audio world and probably paid a bit too much for a Citation II tube amp. I'm having it completely restored by a guy up in Canada, but he seemed to think my current amp wouldn't work well with the tube?

The guy that's doing the rebuild asked what I'm using for an amp now and I told him a Denon 2308CI and he said it would work if I have a pre-amp section, but I won't get the best sound.

Does anybody have any suggestions for a pre-amp that I could use for both CD's and records(eventually) with this amp that won't break what's left of my bank?

The speakers that will be driven are a pair of Martin Logan Vista's. Also, is it possible to have it drive a powered sub-woofer too (it's a Martin Logan too)?

Dave B.