I'd 2nd Pass Labs Aleph 5 would do the trick. No wax build up problems either, but once in a while the lint in my belly button builds up a bit! Perhaps that is impairing my judgement?! With the Aleph's you really need to keep them running for a day or two to get the optimum performance from them, and they do run pretty hot too (class A). Also, you might want to consider running your SS amp with a tube pre-amp for the results you're looking for.
Marco
Marco