Need preamp between PC and stereo

What bind of preamp is needed to go between a PC and a stereo amp. Is the line out from the PC to high in voltage for a a preamp? One preamp had a " Maximum Input Level: 40mVrms @1KHz," which seems to low.
Update: the input level looks right, but could the output overpower the stereo line level input?
I'd use a Benchmark DAC 1 Pre, I had one for a while and it sounds AMAZING, and it will connect via USB and do all the D-A itself.
If you have or wnat more than one source, think preamp.