I agree in that the aero benefits will be negligible between those rims.

I don't remember the EA10 off hand, but I built a lot of FiR rims back in the day. I mean, yeah, I've seen them, but I can't remember being impressed with it in a good or bad way.

I'd save my pennies and get some taller wheel, especially in the front. The front wheel will make the most difference aerodynamically (and coincidentally they're cheaper too).

I ride a TriSpoke/HED3 front wheel and a 32H M17 rear on the track, at least for now.

cdr