I second the recommendation to try the rpha 70 with the normal fiberglass/carbon shell. I use one myself. Decent aerodynamically, very quiet, fairly lightweight. The built in sun-visor is great since you dont have to worry about bringing a second visor if you are out all day. The full carbon version is only slightly lighter and only in black so to me, it wasnt worth the price premium and i like a brighter helmet.
Just to note if you are buying HJC helmets. HJC and the dealers are sitting on quite a lot of old stock, so do check the manufacture dates. If you dont mind older stock, you can get them at a serious discount. I paid 1500 for mine.
Also due to the old stock, the "carbon" look trim on the helmet inner liners may start to peel. I had my helmet straps covers and cheek liners replaced under warranty by HJC malaysia so all good. its mostly aesthetic issue so no big deal for me.
If you can wait, maybe wait for the new 22-06 helmets that are just coming on to market. You might even get the older 22-05 helmets for cheap.
Otherwise if you are stitting on a 2000 budget, you can also explore the Scorpion lineups. Also excellent helmets around the same price range as the RPHA range. There may still be some older stock of carbon EXO 1400s left in stock, assuming they have the size.
Does the rpha 70 come with any freebies like the rpha 11? Pinlock or smoke visor? Also have you tried intercom with the helmet?