i have my sd2.5 and im very pleased with it. but i want louder. should i get an HD3 12 or a loaded BTL 12? is the loaded BTL really worth the $449? i want my next setup to be a one sub SPL setup so if u have any more suggestions besides these two then hit me up. budget is $500. i will get an amp that matches what ever i get next so dont ask what amp i have! lolz. well let me know what yall think.