the reflex sight is definitely the way to go. it's hard to keep an AR pistol steady to use iron sights.
if you have to use iron sights, try to find a hooded front and V shaped rear. you don't have to peer thru a tiny hole that way.
Favorite range gun for the money - CZ 75B or STI Spartan V 9mm
Go-to carry setup - Walther PPS or PPQ in FIST kydex holster 1AK
Favorite semi-auto design - HK P7
"A Sig is like a lightsaber - not as clumsy or random as a Glock."