One of the other main deciding factor for me was that like the OP I was using a 15g sump and the 150 BMK is .5" narrower. The 160 is 9"x7" and the 150 is 9"6.5". This sounds like a negligable difference for most people but when you are trying to fit a skimmer, fuge, and return are in a 15g space is precious. Things are so tight down there the .5" would have honestly made a differece. I really do not think the extra .5" of the 160 cone would have let it fit...even though the chamber was measured to be 7"
This joker is packed. I was able to fit qood powerful skimmer, a large enough to be functional fuge, and a decent return section in there. It did take some planning though.
Here is two weeks worth of skimmate 2 weeks after break in...nice and thick. Was very easy to dial in.
