I have owned both previously, but I sold my TA-30 earlier in the year. Volume control on the TA-30 is horrendous and it is very very loud for most headphones. Fine if you have a digital preamp or if you don't mind lowering volume at source, but if you're trying to use exclusive mode in windows or something, it can be tough without digital preamp volume control. I really liked that I could use inefficient headphones like HE6se with the TA-30. I think the TA-30 is the cleanest and closest to solid state tube amp I've used. In comparison, I have an original WA6 and really love that amp. To me, it sounds like like a SET amp should - clean, but with a focus on mids, a bit of softness and slower roll-off and some euphonic distortion without muddying things up too much. Both are great amps, but if you go with the WA6 I would consider buying used - they're built like tanks and last forever. TA-30 as an all-in-one for a little setup somewhere is awesome, it's a bit smaller than WA6. If you have a dedicated dac and aren't planning to use planars, I would probably go with WA6.