My highlight of choice is Crystal Avalanche-it fits in well because my skin is naturally on the pale side, and I need the shimmer. Nylon is okay but Solar White is way, way, way better.
As far as a great fluidline brush, I like the 210, or the edge of the 231. The 212 I didn't like as much-most people do prefer an angled brush. I haven't tried one myself though; so I can't help on the effectiveness on an angled brush.
I know that they will probably do another F&F sale in a few months, so that will be good for brushes. I know next time (if I get a job by then) I will be getting multiple brushes-138, 187, 228, and 263. I also would pick up some Pro Pans, as I would prefer to get my perm shadows in pan form.
CCO=Cosmetics Company Outlet, although it's officially called The Cosmetics Company Store. They sell MAC, EL, Bobbi Brown, Clinique, and other brands owned by Estee Lauder. Typically the brushes are the brush sets and then LE brushes, however you can get some permanent ones there at the CCO discount.