I am using an Ashdown ABM EVOII (575 watts @ 4 ohms) class d amp. I absolutely adore the tone of this thing. I wouldn't trade it for much else. I am considering pairing it with either the Aguilar DB 2x12 4 ohm (600 watts RMS), or the Aguilar DB 4x10 4 ohm (700 watts RMS) cabinet. I recently demoed both cabs and I could honestly go either way. I do like the weight reduction of the 2x12. My question to my fellow TBers is, which configuration will give me the most headroom? Which will sound "louder"? Thanks!