Tough one, but i'd stick with Brown tonight. Randel El won't do anything against the Eagles Defense, so at least narrow it down to Curtis or Brown if you don't agree with me on Brown.
And think about this: you're down by 40, so you NEED Mcnabb to have a good game. If he doesn't, you're going to lose anyway, so why not start a philly wideout and double your TD points when Mcnabb throws them? If he throws 3 TDs, two to Brown and one to Westy, that's already 36 points.