i use a joe rocket phenoix 2.0 when you take the rain liner out it breathes really well, like riding with a long sleeve shirt on, but i dont know how well it will hold up if you end up on your butt.
i got a leather jacket for the winter, but it doesnt fit right its a little too big and flaps when i get up to speed.
i guess my 2.0 is a little out dated its up to 4.0