Probably a dumb DAC question

Not all tube pre amps sound the same and not all DACs sound the same[ some of us would say none of them do]. Look for a DAC with the kind of sound you like; I assume you did that with the pre. If you are worried about compatability check with the manufactor of your pre but in general about any will work together. I have tube and SS pre amps and have never had problems with the ones I have used.

Stanwal
The reason i ask the question is that when i talked to a certain dac company they said that their dac might be a little too warm sounding to be used with a tubey sounding pre. I had never thought about that until they mentioned it.

Depends on the pre, dac and tubes used - and of course your tastes. I'm using a tube dac and tube pre with outstanding results.