I'm using a LSC head, and I just replaced 4 c90s in two 2x12 lonestar cabs with 4 Vintage 30s, and I couldn't be happier. Gone is the obese bass, accentuated is the sweet midrange, and sweetened are the highs. Your cleans won't be as stupendously hi-fi and grit-less, but I tend to prefer them...