FSA does have problems, and they do have them quite often, but it is my experience that FSA generally makes good. But yes, I'll repeat, they can have their fair share of problems.
Bottom line, I'd still think about the K-Force; but I would definitely purchase it from your bike shop as they will be able to get you warranty and repair information more readily than an eBayer/Internet merchant. All and all though, it's still a nice bit of a equipment.