I'm definetly not going for the O'netics.I don't claim to be an expert but there's so much BS about trannies imvho.There's a 'shoot-out' between several that Granger amps did(that I found via SLOCLONEFORUM)and everyone agreed that the uber expensive Mercury Magnetics were the least pleasing and the cheapest Magnetic Components were the most pleasing.I linked it to my amptech builder mate and he laughed at me saying the difference in 'tone' on the mp3s were most likely down to voltage.Either way the difference is very subtle at best.I'm going to use the Magnetic Components 'Classic tone' trannies in this-the same ones Granger amps use iirc. $200 for pt/ot/choke for 240V/6l6/multi ohm... they look good too with a black finish and the Classic Tone logo which is important I'm going for an openfaced SLO style cab haha