You probably don't want a helmet with a long tail if that's your usual head position.

I would not worry about the helmet with that position. I would work on getting into a more aggressive position and worry about the helmet later. That will make you faster.

That is as low as I can get my pads. And as long as uci will allow the extensions. Cannot downsize my frame gor anther sc as my seatpost could not be place high enough then. Sorta stuck.
Where do I go next. New bike?

Raising the hands with a higher rise extensions should drop your elbows a bit and lower your torso. Simon Smart make really nice extensions with up to a 40 degree rise. I don't know if it applies to your SC, but TriRig has some much simpler mounting hardware for SCs that I think also allows you to further lower the pads

http://www.tririg.com/...id=2011_05_SC_Clamps

Then dropping your head and rotating the chin forward will get the tail of the helmet out of the wind. Unless you can make some semi radical positin changes, the Kask is probably one of your better choices.

Shorter cranks ...maybe 165? then you can raise your saddle and flatten your back. Is your stem flush with your top tube?

Maybe I should be loking for a helmet like the ekoi crx13 or casco speed time. Neither have a tail to dpeak of.