Which DAC makers let you do in home trial?

Apos audio offers 30 day return, crutchfield I think is 60 days. 

If you're going to have a tube amplifier personally I wouldn't get a tube dac, I would also be carefull looking at R2R dacs they can be expensive for what you get, avoid NOS.

I don't think I've bought many products that my dealer hasn't let me demo in my home for at least a few days.  I'm in Northern NJ and deal with Johnny Rutan at Audio Connection.  Maybe there's a good dealer in your neck of the woods.

I'll try for local dealers. Djones, why not tube DAC with tube amp? Also, you suspect R2R are overpriced, overhyped? Can you elaborate? Thanks. 

An R2R DAC done well is more expensive to make. It's just the technology. I wouldn't say  overhyped nor over priced since it is  costly to make a good one. . In my opinion if I am using a tube amp I want to feed that amp the clearest distortion free signal I can since I want the sound of the tube amp coming through. Tube DACs add their own coloration, some like doing that , I don't  it's a preference thing. I would rather use something like a Benchmark DAC3 which is a very neutral DAC. Some will probably chime in on getting a NOS R2R DAC which is non over sampling. You might prefer it, some people do but once again unless done well with proper filtering they can be noisy on the analog output so you're not sending a good clear signal to your preamp or integrated. If you can try different ones do so and see what you like its your system,  room and hearing.