The Audio Technica AT-PEQ3 sounds good and is inexpensive. It was reviewed by Michael Fremer of Stereophile in December.
"How about a sweet sounding starter phono preamp that lists for $119 but can be had online for under $70?
It's the Audio-Technica AT-PEQ3, a little plug'n'play box with a wall-wart power supply that's quiet,
sounds clean and suprisingly dynamic, and get's the job done remarkably well."
- Michael Fremer, Stereophile, Vol. 32 No.12, December 2009