Need help picking a preamp.


I'm a long time listener to music and am trying to slowly upgrade to a better quality sound. Looking for a preamp in the 500-$600.00 range but am willing to go to 700-$800.00 range if the extra money would equate to a difference my ears would hear. Do not know which is better (SS or Tube) in my price range and with my setup listed.I assume used in the way to go.(Jazz, Classic Rock, Rock)

Nad C720BEE
Yamaha Av RX-V530
Onkyo disc
PSB Image T65
PSB Image S50
PSB Image C60
Yamaha Sub SW 90
garypic
Classe is an excellent way to go. I'd agree with Almarg.

A Musical Fidelity A3CR pre-amp used would be another good option close to that range particularly if phono is desired.

Those are the ones in that price range I actually considered recently. I ended splurging for an Audio Research sp16 tube pre-amp that cost a good bit more in the end.
There's a TAD 150 signature posted here for $700 - which is a good price on a great tube preamp. I don't know the seller, but own one myself.
If a tube pre-amp piques your interest, Juicy Music pre-amps are also highly regarded by many and often come up for sale here for under $1000. These were on my recent short list as well.
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How much more of a increase in $'s would I have to have to hear a difference. Would I also need a new amp, if so, how much more of an amp?