I have a Strikefire II and a Primary Arms Advanced. Both are good choices for different reasons. The warranty on the Vortex is extremely good. The battery life on the PA Advanced is a big asset. If I was going to go with just one at this point I'd probably go with the PA Advanced but there are good reasons to go the other way instead.

These aren't sights you can take to war with you but they will do pretty well on a rifle that spends most of it's life in a safe or sitting ready in the corner.