I have owned ARE and LEER caps before. In the east they are referred to as caps. I felt the ARE was built a little better than the LEER based on thickness of fiberglass, mounting hardware, rear door hardware. That is my opinion and may very between models so i would recommend looking at them both, see what you think. I will never by a cap without the windoors on the side. Having the ability to open the side windows and reach in is well worth the additional price.
I saw Ryans Cap Pack just the other day. It is absolutely awesome. It looked like it would be easy to install with the help of a buddy. The mounting hardware had a rubber looking seal over it to prevent leaking. I did not do a close inspection but it appeared to be top notch.