If you don't already have the T1s, I would strongly consider one of Jan Meier's combo deals. When you buy the T1s from him, he gives you a crazy deal on one of his amps. If you already have the T1s, I'd still consider his "Corda Rock" amp...that would be the minimum I'd go for, personally....and it's actually a very good minimum. You could also consider the Fiio E9 amp. I had problems with the one I bought for the DT880s and sent it back, but others seem to have success.