I'm piecing together my next substage and I plan to run a single 12" on 1200-1500rms. I'm looking for about 60% SPL and 40% SQ. I plan to tune around 30hz and will most likely have the box built and designed by pro-rabbit or double 07. My price range is $250-300 for the single 12." What are you recommendations? I'm pretty open to anything as long as it's new. I'm not interested in buying used subs (amp I may buy used though).