headphone amp senn 6XX

Another moderate priced headphone amp suggestions for the senn 6xx?

So far i see drop cavaliers CTH. I'm ready to go with this, any there t thoughts for this beginner audiophile?

From a performance/price perspective the Cavalli CTH is tough to beat especially because it seems to synergize extremely well with the 6xx.  Plus you have the ability to goose the sound a bit with different and relatively inexpensive tubes if you want, although the stock tube seems to be pretty solid.  Go for it!