i'm going to retube my mesa 400+ (it needs it badly). anyway...i'm stuck between the following sets: svetlana 6L6GC's w/ 12ax7eh's -or- jj electronic 6L6GC's w/ jj 12ax7's i've heard good things about both. they're both in the same price range. i'm looking for a thick, balanced tone, and something that will go LOUD and not break up/distort too quickly. i've already emailed lord valve, but he hasn't gotten back to me yet, so i wanted to hear your opinions. thanks.