i honestly doubt your 3 visoniks would touch "other name brands"because my buddy has a 10" one in his trunk and i cant even tell its there now i have 2 12"jlw0s and i can almost garontee that my system would put yours to shame through and through and im just an ammiture into the whole car audio thing so dont go asking us if some thing is any good and then get an honest oppinion and then go and tell us your three subs are the best things out there
i running a 1200 watt visonik amp, and it pushes my 15" Treo SSi pretty good, but as for the subs the higher end ones are ok, the lower end ones have problems, but if you feed them enough power, they'll bang it just won't sound that great (SQ). One of the best "cheap" subs in my opinion.