At a 15% driveline loss, 252 rwhp is 296.5 fwhp....stock. The 284 rwhp is 334 fwhp, not bad for a CAI and tune (+37.6 fwhp). Personally I think the flow volume of the air raid is probably comparable to the C&L (FYI I'm not impressed with the crummy shroud on my new C&L, which doesn't even seal the gap between the MAF housing and the shroud).
I'd say you're doing well with the gains yu have for the investment, and I'd rather spend the $$ on another mod....like a MGW shifter or better brakes. I'd suggest the CMCV deletes, but its harder to return to stock when you have those done.