I use a Eureka! Solitaire.
It's fairly light and rolled up with my sleeping pad and quilt, it takes up less space than a sleeping bag.
I hang it between my drop bars. I've camped in high wind and rain with it.
Pros:
Regularly goes on sale at Academy Sports for $69.99 (online, it's usually $90 - $120, which is not horrible)
Sets up quickly.
Sturdy.
Built-in waterproof fly.
Cons:
Is not free-standing. Stakes or tie-outs are required.
Waterproof fly is built-in. In some climates, it would be nice to leave this at home.
Both of these "features" mean it could be lighter.
The small end has no screen option. This would increase the ability to cool off in the summer.