I prefer the ACOG. but they are pricey.
Leupold, Nikon, Nightforce all make good units.
Personally, I would avoid anything made by Tasco, Bushnell, Simmons or anything else in their category. Good glass isn't cheap, but it's well worth the time and effort of saving up your money for a few months.
And for a 5.56X45, the 1.5-4X20 is near ideal. 2-7 and 1.5-6 are good. But you don't need 4-12 or even 3-9 on a .223.
For .308, 2-7 and even 3-9 are okay, but again, anything over 9x, IMHO isn't needed.
I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."
Last edited by locutus; 02-20-2013 at 06:00 PM.