Not to piss anyone off, I read through lots of earlier posts trying to get my answer and I am still pretty unclear. What I'm looking for is to replace an Ampeg B4r. I have an Avatar Neo 4-10 4 Ohm but would consider buying a new cab if necessary. I rehearse with 3 other guitar players and a drummer that hits pretty hard. We don't practice as loud as a large gig but close to it. I play mainly my MM 5 and I find I have to push my head to where both pre gain and post gain are lighting up like Christmas and its starts to bottom out. I have had other cabs with this same head and same problems. I'm looking for hard punchy bright tones that never bottom out and I want plenty of headroom so I don't feel like I'm pushing my amp to hard. I am surely getting a new amp for starters and I do not want a tube power section. It's loud but too warm and furry. I'm not sold on class D digital. My guitarist is an audiophile professional and says the digital amps are nice because they are light and loud but can't reproduce some of the harmonics and richness that amps with huge power supplies have and they don't have the capacitance to hit as hard either. Now I don't want to get into a debate including "D" amps or Tubes Please. I'm thinking of a few different heads but please name others if you think they could apply. GnK 2001, Ampeg SVT -4 Pro, Mesa V-12, SWR 1500. Again loud bright, tight low end, sort of Tool meets STP. I am loosing sleep over the decision and I hate to blow cash only to find I should have spent a few more bucks like I did with this B4R. Tube Pre amps are fine and I think they could possibly help me. If your only gonna tell me I'm a moron don't bother I already know. Just try to be helpful.