I've owned the following lightweight amps - GB shuttle 6, EA micro 300, EA iamp500, AI Clarus, GB Neo-Pak, WW Ultra, RH450, MB LMK, SA450, LMII and F500.
I'd be happy to have any of them again apart from the EA's. Having said that I spent this morning with an Ibanez P5110 (with the P500H head) and given the head price of £360, and the fact that it apparently has a 5 year warranty, I'd be tempted to go that route. The only thing the head doesn't have is an effects send/return, and if you overdrive the input it can produce a hell of a thud (phase reversal?), but soundwise it's fine. Tried the head through an EA MLine, and it sounds like a mix of a NeoPak and RH450, so no problems there.