The guy said he wasn't sure he wanted to spend big bucks on an ACOG (thems is really big bucks!) or EOTECH. The irons are cheap
But if you must have a RD, check out Primary Arms' M3 multiple reticle 2 MOA red dot. You can get a package deal for less than $200 which includes sight, 3x magnifier and mounts. The quality is very good for the money. I even read one guy prefered the PA red dot over his Aimpoint. If you buy an Aimpoint later, the PA mounts and magnifier will work with it.