Pls recommend a tupe pre under 2500 for my system.

I 'd like to add some warmth to my system by adding a used tube preamp to it for less than $2,500. I listen to everything except rap. My current set-up is used for HT and 2 channel listening, and is comprised of the following pieces:

• Bel Canto Ref 500S
• Arcam AV8
• Ohm 100 S3
• Arcam FMJ 139
• Synergistc wires
• PS Audio Quintet

This will be my first piece of tubed gear. Thanks!