Focker
Headphoneus Supremus
*very* nice but out of budget is Beyers own A2. Their A20 might also be an interesting option, though I've not heard that combination for long enough.
As @Focker mentioned Meier Audio amps pair very well with the T1. I own a Corda Classic and can support that claim. Jans gear offers solid value for its price, so stretching your budget a bit to reach the Classic (or waiting for a sale, maybe around Christmas) is well worth it.
Good call..I always forget about the Beyer amp. Have heard many positive reviews on it.