Subwoofer info

After what seems like a hundred hours or more of reading.  I think I am at the end of my search for subs.  If anyone has listened to any of these subs, I would greatly appreciate your review on them.  After all this research I have narrowed it down to 3 subs, I dont really care about any other subs, probably due to this 2 months of research. Exhaustion has set in and a choice needs to be made.  I have only had the chance to listen to a few, best buy being my source for listening. I did listen to Martin,  rel,  svs sb 2000 and sb 4000. Rel and Martin's under 1k, did not give me toe tapping. Both svs's did. (I will be selling both my vanderstien 2wq, i havent listened to them in yrs and just want new toys)  Other than BB, I have to travel quite far for hi end.  I listen to 60/40 music/HT.  My room is 8'x14'x24'.  Front spkrs are totem winds. I will be purchasing one in February and a second with 6 months.  In order these are my choices.
1.  Svs sb 3000. 
2.  Rymthik f12se.  
3.  Paradigm defiance x12

I've read alot on svs and rymthik, can't find much on x12.  Worried about rymthik only having 370 amp, yes I know it's servo. But svs is 800/2500. Quite a difference.  I thought about 15 inch sub, but the weight is crazy.  Ported is also heavy and possibly not up to my standards for tight music.  So I guess my question is,  who has listened to these 3 subs and what is your experience and evaluation of these subs. Details are appreciated.  Thanks, Pete