Hey guys...

I'm about to purchase an AR-15 but i'm not totally sure what I want.  I've been looking at:

http://www.eaglefirearms.net/Rock%20River%20Arms%20Rifles.htm

considering buying a RRA AR-15.  Is RRA a decent brand?  Also, I was considering buying either the Quad Rail AR-15 or the Govt. Model.  I like the EOTech 552 Holosight but is it really worth the money?  I was also considering just buying the Quad Rail model and getting the detachable side mount sling swivel, the VTAC sling, and possibly a Trijicon sight...TA01NSN plus a bipod...I like that this scope has backup iron sights on top...is there a better trijicon scope than this one?  One more thing...on the Quad Rail model it says the barrel is a "Wilson chrome lined" and the govt model says it's, "Wilson Chrome lined, Chrome Moly"....is there a difference?

I guess i'm just basically looking for opinions and comments.  

It all sounds good to me go for it. Rock River is very good stuff.