If you like the 999 just get it. Any difference between the two will be purely aesthetics, I've got two 999s and they'll clench just fine.
Edit I didn't see that you were looking at the 150 and not the 999 shape. I agree that something with a curve will hang a little better for longer time periods.
Last edited by Commander Quan; 05-24-2012 at 12:02 PM.
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