I have not used the coil roofing gun, but bought the older discontinued central pneumatic framing gun and the same staple gun.... both were horrible, constantly jamming and mis firing. Out of the two you listed, I would go with the Bauer. I have had people tell me they liked them and did not have much trouble with them.
I had Paslode guns when I was working professionally. A couple of years ago, I needed one in a pinch and bought a Husky brand framing gun from Home Depot. It has held up better than the Paslode, it has never missed a nail, never jammed. I have probably shot 20K nails through it without a glitch. Last year I bought a set of 4 Husky trim and staple guns. Never a problem with them either. They were a few dollars more than the HF ones. I do not know about the new HF brands they are carrying.
Not all the HD stores stock them. They do sell rebuild kits and pistons for them online. You might be able to get one....
If and when I need to get more, I will definitely get the Ridgid pneumatic guns. I now have a whole set of their cordless tools and 3 of their stationary tools. I am very impressed with the Ridgid tools.