I'm having a dual 6v6 amp built by John Nau and have to decide on speakers. I'm leaning heavily on the idea of a 2x10 cab loaded with an alnico Blue Pup and a Silver Ten. I like the sound of two speakers as opposed to one and the 10" alnico speakers should make for a reasonably lightweight package. I noticed that many low-powered amps are paired with 10" speakers and was wondering why that is. Also, what might I be giving up using 10's as opposed to 12's?