I'm still missing something(aren't we always). So, my plan is to run the helix with a tube amp into a loadbox to go into the interface. Helix sounds fantastic plugged into the return of my buddies JCM900, and I am no fan of Marshalls. So here I think "well to save me a few bucks, can't I just buy like a EVH LBX?" I'm stuck between the 50 watt 5153 and the LBX, but if I get the LBX I can still afford the new monitors I want. SO, basically, looking for feedback from users of both, and anyone with experience using the lower powered "lunchbox" style heads(really anything 30 watt and under) with a load box.