Generic83

Hi all, I have been using HTIB and have recently decided to upgrade my audio. Went with Klipsch as I think its awesome!!! Recently purcahsed an Onkyo sr608 amp with the Klipsch Quintet IV that came with the sw350 sub. For just $100 more, I've been given the option by my local store to upgrade to the SW450. I live in a share house and I am scared the SW450 will be too powerful. My room is 12ft x 9 ft. I am kinda torn and indecisive whether to upgrade or not. I wont be changing my audio for quite some time and I feel the extra $100 is worht it. I have read the reviews, the 350 can do the job but the 450 definitely can give a full bass feel. I am just wondering, if I dont fell like it, wuld it be possible to turn the sub vol down and still feel the bass without the huge thumping? Anyone with experience wih these subs do advise! I have a week to decide for the trade in!!! Indecisive, Generic83