i agree w/others, who have said bookshelf vs floorstanding is not the issue. i have used bookshelf speakers in a huge (26x38) room, w/excellent results - but i use a pair of stereo subs. it's my opinion that using a pair of subs will help any speakers, bookshelf or floorstanding. and, in any sized room. when i 1st got my sub system, i was using floorstanders that were -2db at 20hz. w/the the subs, the overall improvement in sound was not subtle - the bass was better, & the midrange also improved as the mains didn't have to strain to do the low frequencies. for reasons noted above, adding a pair of subs in a small room will improve things drastically - it's difficult to get proper bass in a small room, & your mains will work better w/o having to do it. having a pair of subs vs a single sub will also make it easier to properly integrate the low end - more even room loading & less distortion will result w/a pair of subs vs using only one.