Dual subs and room size


Hi. I've been considering dual subs with speaker input to pair with my Martin Logan 35xt's and not sure what I should be considering in relation to room size. My room is 17' X 10' with the equip along the long wall. I've been looking at SVS sb1000s and HSU vtf 1/3. The SVS are 12" sealed vs 10" ported hybrid for the HSU. It was suggested that I go with no more than 10".  They will support 100% music. The speakers are pretty much an 9' equidistant triangle set up and would be looking to set the subs on the outer side of the standmounts. Any thoughts or advice would be greatly appreciated. Thanks, Dave

italian
I should also add, I wouldn't be such a proponent if I didn't have personal, practical experience with everything I have mentioned. Doing it right is pretty damn awesome, but spend your money however you want to. :)

Best,

Erik
This subject keeps returning. I think, most agree that two subs are always better. Two good subs.
I don't disagree Inna, but in my personal spaces, 1 was so good I reached a point where I couldn't shell out the cash for the second. :)

Your own mileage and money may vary, and nothing prevents you from buying 1 now, and 1 later.

Best,

Erik
Erik, right. Just because something is better doesn't mean that something else cannot be good, it can.
Thank you all for your comments and insights. I do have wall treatment and bass traps in the front wall corners. I have large framed maps on the walls and tried to reduce the effects of the glass. You all have put forth a lot of info, much of which I'll have to digest. Simply, I was thinking two to provide a balanced stereo sound across the freqs. I don't do thumping overbass and didn't want to find my space overloaded by using two. In the end perhaps the conservative approach would be to start off with one and see how it sounds.