Other than buying a Marshall Duel Super 100W head which has the classic crunch setting built right in, which by the way is the exact tone I'm looking to get close to, what's the best way to achieve the closest tone, yet stay within the relm of a 30-50W combo amp, mostly for home use. I'm figuring an all tube combo, and I already have a Tube Screamer. The tone I'm looking for, think early Frehley, Deep Purple, early Zep. Basically 70's classic rock/metal. Any thoughts?