While I agree that your room is probably big enough for the 3.x series, I think you would be very happy with the 1.7i. I have both the 3.7i and 1.7i. I think the 1.7i provides very close to the same musical performance as the 3.7i at a much lower price. I use mine with a REL sub to supplement the very bottom but, in truth, I could live very happily with the 1.7i's alone.
LarryRS
LarryRS