I don't think there is any reasonable answer to that question, particularly because no particular requirements are specified. Is remote control a necessary feature (to me it is), is a balance control important (again a necessity for me)?
Do you really mean a preamp (meaning with a phono stage) or are you talking about a linestage? If a preamp, does it have to work with a moving coil cartridge, and if so, how much gain is needed.
If I were in the market for a fairly high-end linestage, I would look at the Atmasphere linestages and Backert linestages. I would also agree that something from Audio Note and Shindo would also be good candidates.
For that kind of money, you could even get certain builders to make custom linestages or preamps. I have a preamp custom made by Deja Vu Audio (Northern Va.) that was built to my requirements--remote volume control, balance control, input transformers and output transformers to mate with my amplifier which has input transformers. By now, this model would exceed $15,000, but they make models that are a lot less expensive.