I'd take the BL over the HDC3 in all honesty, especially if you are going to be tuning around 32. The AQ amp you were originally going to buy would work for either sub just fine, but so will the B2 amp. The difference in output between 1200 and 1500 watts is not very much. The most important part of the sub stage is the enclosure, that will make or break your system. If you aren't going to be doing much for electrical upgrades I'd take the AQ over the B2 amp because it will draw less current.