I've got a mesa boogie 4x10 cab that is 600W. I've currently got a 500W head on it but I always feel like I gotta crank it to get it to the volume I want it at. I have started looking at new heads but I was wondering, is it better to have a head that is slightly less in wattage than the cab or vice versa? I had been looking at the Orange Terror series and they make amp heads that are 500W and 1000W and I can't decide which one would be a better option. Any advice on the technicalities of this would be awesome. Thanks!