I have a prototype Felt B2, circa 2006 but bought in 2010, that has a 78deg seat tube but in other aspects is the same…but that Planet-X deal is calling my name…talk me into/out of making this switch…please…
The B2 fits great and is in great shape, so I have no real reason to make the switch other than full carbon, and the frame is, I think, from an unbranded tiawan factory as I got it stealth black with no decals at all…
Can’t say anything other than I just ordered my Planet X 
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One way to help you make the decision is to put your B2 up on the classifieds and see if it’s someone else’s dream bike. If you find a good home for her, then the decision will be easy.
Rock the PX. Check out the planet x porn thread. That’ll help you make a decision.