Stoneface,
I would take a trip to your dealer and see what there is. Most of them will let you hold the bags up to bike and see what they look like too. I have the leatherworks bags on my FXDWG and like the way they look a lot. I would say that you would have a tough time fitting both a cover and rain gear in one side. I keep a cover in one of the bags and atill have room for some other good sized items though. Depends on how big the rain gear I guess. Here is a photo of the bags:
There are some more images
Here
Unfortunately you will have to move the rear turn signals.
Fangar