I couldnt agree with Rives more, I too have tried both and feel that the trouble involved in finding a tightly matched quad isnt worth the hassle. My amp (Air Tight ATM 1) requires tightly matched quads and the ones you find here and on ebay may be called or claimed to be mathched, but my experience has proven otherwise. the problem lies in there being very few Mullards to choose over to get a good match....aside from that, the Svetlanas and even the JJs, sound very good and cost about 5-8 times less.
