You could always try tubes with arcs-for that sort of money...maybe not a good idea if there is a possibility of moving up the Shahinian chain but worth a listen against ss amps with arcs-an ear integrated or try Manley Labs-I tried snappers with my Obelisks but they only just ran out of puff but sounded lovely, they do a stingray amp which looks nice and affordable. You won't go far wrong with Avondale M130's, its a matter of chopping and changing and dont be too quick to part with your £££. Great results from Meridian 5 series with obs but a 557 would be all you would need- regulars on ebay.
...it seems Arc 2 are now on the near horizen
Whats your music tastes?...Also Bryston 4bsst would have them twitching
Si