Hi, I would like to purchase either the f12 or f15 to pair with my HTM-200s for my home theater. My set up is 3 HTM 200's across the front and sonance 621r surrounds. Is there any concern about the f15 being too "overpowering" for my smallish LCR speakers? I want the best bass possible and my first choice is to get the f15 so I won't need to upgrade later. But if the f12 would integrate better with my system I'd be willing to get the f12. Any thoughts?