Hate to say it but kevin Deal at Upscale get's so much of market (has very good testing machine and you don't have to worry about phonies) but his prices aren't a give away and phone manner sucks.but he has heard the match ups and will point you to Mazda's or Buggle Boys' or tellfunkens based on the equipment.Not that I would get in touch with other stores (www.the tubestore.com etc) before I bought.
Chazzbo
Chazzbo