well thanks for the options folks.. why would a sub not go as deep as my towers?? 40 Hz is as low as they go.. the kenwood for example.. alledgedly goes down to 25Hz... maybe 27-30 IMO cuz it just didnt seem THAT low.. the Yammy claims 30 Hz and i would trust Yamaha to print accurate info with their rep.. the Quest.. welll.. that 8 in really wouldnt ADD much bass to my system but it would give a bit more punch.. just not alot of it.. $100 worth? thats debetable.. which is why i havent baught it yet.. the QS10II claims it goes down to 32Hz.. but honestly.. felt a tad bit deeper.. wish i had a meter to check in store each and every one.. but i dont.. so i gotta go with my ears.. all of these subs seem to go deeper then my towers./. which is why ive considered them in the first place

i checked out that site thats been mentionned.. but everything blows over my budget... 250 total.. sub in my hands.. hooked up and playing.. but thanks for the idea

anyone have suggestions on brands/models and what else to look for in a sub in this price range? anything is helpfull