I'm going to be purchasing Sound Splinter RLP's here soon, to upgrade from my current 2 12" Kicker CVR's (03 model) and this time around, I'm looking for 100% more SQ while still getting fairly loud. I heard great things about these subs and how great their SQ is, which got me wanting to check these out. My amp is a JBL GTO1201.1, 787rms @ 4ohms and 1114rms @ 2ohms. If I went with 2 12's, I wouldn't be able to power them properly, but if I got a single 15" I think 1114rms would be perfect. I'm going for a sealed enclosure for either sub (I don't mind ported, I'm just a bigger fan of sealed) Now, after switching from 2 SPL subs, I'm afraid I'd be disappointed in output with a single 15", but then again with my listening tastes, it might be perfect. Which setup would be best? If I go with 2 12's, then I would need another JBL GTO1201 or a bigger amp that does at least 1600-2000rms. Which would cause more batteries and such. (Just seems like a hassel if I went with 2 12"s) I don't know what to do. Any opinions?