I don't know the size of your room? Heres a thought already mentioned by bidgman.....try the 175....I have a room 13x14x8 and being in the same position as many, questioned the 175 or the 350. Having used the 175 for about a month I will keep the 175. If your room is larger(or you might end up with your system in a larger room) the 350 might better suit your needs(or you could always buy another 175). The dreaded up-grade disease afflicts us all.

Tom