which optic?????/iron sight????????

I love my new DPMS AR, buuuuuut I still don't have a optic!!!! I have the MBUSs on it, but i still have to order a new front BUIS(due to the gas block), so they really arent doing me any good at the moment, I'll get to that in a minute though.

1) I have plenty of experience with the EOTech 512, great optic, but I think i wanna go the battery-less route. I'm thinking the Trijicon line right now, but I dont know which model(larger or small): http://trijicon.com/user/parts/parts_new.cfm?categoryID=8

also which MOA dot? i'm normally more of a pistol/iron sights guy, so this is a whole new world to me!

I'm not at all closed to a battery powered optic, but I think I would appreciate something that I dont have to rely on the availability of batteries for(think :shtf: scenario). Plus its always on, no buttons to fumble with at night.

The Trijicon line is on the same price level as the EOTechs, and appears to be cheaper than Aimpoints, which i have no experience with.

Heck, even if you don't have any experience with any of these optics at all, but know of a place either around Hattiesburg or Florence that has any on display that I can check out, that would be GREAT!!!!

2) Now, which BUIS? I'm trying to not spend $200+ on them. I've mostly been looking at YHM http://yankeehillmachine.com/store/sights.html
the gas block mounted front flip sight and the flip rear sight.

Once again, i'm open to any suggestions. If nothing else I will just go with a iron front for the time being and leave the mbus rear.

BUT, if I go with a Trijicon Reflex, will there even be a point in having BUISs???

sorry for the long post, just wanted to get everyone on my level of thinking for a minute. Thanks in advance