You need a tube amp which has a fair bit of current delivery. You might consider a hybrid amp (tubes AND transistors) like the Butler TDB-2250 which has a MOSFET output coupled with tubes. Plenty of power AND current from this amp....
-RW-
PS: I owned a TDB-5150 - a magnificent amp and the 2250 is even better...
http://butleraudio.com/tdb2250.php