i have never really have any experience with Fi audio and was hoping to get some feedback. i want to switch to fi subs but i dont have the money yet and i saw that fi x-series was on sale. i currenly have two 12" memphis hpo (old m3) on a 1000 watt amp, but my question is should i get three new 12" Fi x-series? would they sound better than my two hpos? nothing is wrong with the hpos, i just want to get new subs? would the x series be better or should i just stick with my hpos?? any input is appreciated. thanks