are they alright? i was thinkin of buyin 2 12" infinity reference 1230w's, and an MTX dual 12" box. is a q-logic worth the extra $20? or is MTX fine? its made of particle board, should i go with the q-logic's MDF? im looking to put 225 watts into the subs, the reference is 50-300 RMS, so it should be ok. how do they sound? is the kappa worth the extra $$$?