"I've got the two top rated helmets! Ballista and the Bell one.
Ballista is an aero helmet though...made for racing. ..can get pretty hot if you're using it for general use.
It's a great helmet otherwise. "
"Virginia Tech is doing some testing on bike helmets - the current "best" one is Bontrager Ballista MIPS. The Cycling Tips article says testing is ongoing.
The Bontrager helmet is on sale for $160 ATM."