Dainese Wave V
http://www.go-ride.com/ProductDetail...000-1116706835
Acerbis Koerta
http://mx1west.com/index.asp?PageAct...ROD&ProdID=118
RockGardn Sports FlaK jacket
http://http://www.rockgardn.com/item...htm?1=1&menu=1
Each has it's own advantages/disadvantages. The Dainese is really nice and really expensive at $399. The Acerbis has some collar bone protection but no rib protection (this is what I use at the moment). The RockGardn no collar bone protection but it does have some rib protection which is rare.
All are a compromise in some way. Personally I believe a combination of under and over systems may be the best and provide the most comfort/cooling. It's just not made. Until then I keep searching for the ultimate combo for protection. Look into lacrosse gear for rib protection.
Here are some other interesting things to look at for ideas.
http://www.itech.com/default.aspx?it...O&intro=player These hockey shoulder pads chest/back protectors are really nice. Hot...could be
http://www.rxrprotectnorthamerica.com/index.asp Pump yourself up
http://www.tekrider.com/rs_01.html
http://www.forcefieldbodyarmour.co.uk/rib_protector.asp Interesting rib protection and some other stuff as well.
Hope that helps you out
Skidad in MA