I like bead sights. Theyre practical in most all situations and completely natural to shotguns! Rifle sights are nice too, and I'm certain the LPA's (or GRS) are great too... a bead is just simple and natural with no adjustment to cheek weld and as long as it can be picked up quickly its hard to beat.
I also have a Meprolight bead, its been great and the only learning curve was that due to the higher profile I found I had to cover the target a bit more. Each gun shoots a bit differently so results could be different.
Check out this thread on bead sights;
Shotgun Bead Sights