I have a full rain suit, but it's not bike specific. As a result, it was much more affordable. My jacket is just a generic waterproof windbreaker and pants are just regular rain pants. About $50 for both. They are light and fold up very small. I guess the only downside is there are no vents.

Booties work well for the feet. $40 shower pass.

Why "just get wet" when you can stay dry? Sure, sweat can be a problem, but just slow it down and it's really not an issue. I don't know about you, but I'm not trying to break any land speed records in a downpour. In fact, I'm being more cautious, so I'm slowing down anyways.