Two inches of barrel would cost you anywhere from 50 to about 80 fps, not that big a deal. Accuracy looses or gains are a little more unpredictable, but with a good recrown you should be fine accuracy-wise.
Accuracy can be retuned with hand loads. A shorter barrel is a stiffer barrel which often widens the node of "the" powder charge.
Base? EGW 20 MOA aluminum.
FFP for less that $700? Nothing comes to mind in that price range, but I'll look.