Yep since my room is only 16x13x10 (medium-ish) I still chose the VP150 since I always second guess myself. There would be that little voice asking myself if I should have spent the extra $145. (I'm sure you guys know what I mean).

I think as others have stated, the VP150 is for larger rooms and plays a little louder (not sure on clarity but I assume so since it has an extra mid and tweeter).
Go with what you can afford. I am quite happy with my setup.