Top secret amplifier information:
Search 'Traynor' on ebay. Look for the 70's versions. Traynors are basically Fender / Marshall hybrids, with better components and top quality transformers (Hammond). Many Marshall amps are just copies of the Fender Bassman circuit... shhhh! Only some slight changes to the preamp section and tone controls. Traynor too bases many of the circuit designs on the Fender Bassman.
They sound amazing, and are $cheap$ - as they're mostly unknown outside of Canada. The prices are raising, however. You'll find a bunch on Ebay
Great Traynor combos: YGM-3, YBA-2
Great Traynor heads: YBA-1, YBA-1A
A number of very high profile amp gurus and players have nothing but the highest respect for Traynor amps from the 60's/70's, as they are simply fantastic.
Pete Traynor himself tested all his designs by pushing them out a 5 story window!!
http://www.informatik.uni-bremen.de/~dace/vb/http://tone-lizard.com/Traynor_Amplifiers.htm