In need of Audio Research preamp recommendation


I have an Audio Research D400MKII amplifier driving Revel Gem speakers.
I'm looking for AR preamp recommendations for this system.
wpines
Checkout the Audio Research database www.arcdb.ws website for models and specifications. I have had over the years a LS-3, Ls-15, LS-16 LS-25MKII and a REF 1. All were good pieces. My favorite among the lot was the Ls-25MKII. It is very good piece and can be had for aournd $2,500 - $3,000 used.
What is your price range? It will be hard to give recommendation without that info.