I'm interested in the Mark V and previously tried the Mark IV which had beautiful cleans but I didnt really like the lead that much. Today I got to try a Mark V combo and when I tried the cleans and crunch, they were beautiful. It was an amazing amp. Now the 3rd channel, I got pretty heavy with Mark IV mode and Extreme using a jackson guitar with high output seymour duncan passives but it didnt have a "big" low end. I know the rec's have great low end chugs and are rhythm monsters but i dont like the leads or the crunchs or the cleans that much compared to the mark V. I think i'm more of a mark fan then a rectifier. I'm just wondering if I used something like a overdrive in front and a guitar with active emgs and potentially a boss EQ, could I get a bigger sound that modern bands use today? I'm not looking for a rec sound, just something big and meaty. Would the head version with a cab with 4 V30's make it more heavy (closed back)? Would new preamp tubes or power tubes help it to get that? I just want to have those amazing cleans and great crunch and amazing leads along with a good meaty rhythm for a more modern metal tone. Think I could get that with any of those changes? This amp has impressed me and im seriously considering ordering a head. sell me on it!