I can vouch for the Audio Research SP16. Superb preamplifier for the money. Couldn't be happier with mine. Actually, it is the SP16L sans phono. Like Dave I already have a dedicated phono preamp (in my case, an Audio Research PH3).
The SP16 has all the fine qualities of tubes with modern conveniences such as remote control, noise free electronically controlled volume and source relay switching.
This unit has just been replaced with an hybrid model (the SP17). Watch out for some closeout specials!