Here is the set-up I used at the Nats:

Airplane: Composite-ARF Impact
Radio: Futaba 9ZAP
Servos: Futaba: Ail: 9151, Elv: 9650, Rud:9151
RX: Futaba 148 DP
Motor: Hacker C-50 14XL 6.7:1 Acro
Controller: Master-90-Acro
Prop: APC-E 22x12
Batteries: Thunder Power 10S3P 6000 mAh ($325 a half-pack, $650 for the 10S3P)
Duralite 6V reg with 730 2-cell
Kirby's Kustom (last minute) Graphics
Wt: 11lbs RTF

The airplane was finished just before I left for the Nats, but having flown the Rev-Pro all year, it was easy to get adjusted to the Impact. It actually performed better than the Rev-Pro, so it gave me a bit of a confidence boost once I had it set-up. The plane was 2.2 ounces over 11lbs when I left home, but I used a Tru-Turn spinner instead of the supplied Carbon one, and had a bit of extra "junk" here and there. I do have another Impact here that I will stick my OS 140 EFI (or maybe 160 FI) but not until November or so after all the big plane contests are done with.