I don't know a whole lot about Ruger AR's other then they're usually considered a entry level AR.
The AR market is over saturated right now. There are a lot of good deals to be had out there on service grade AR's such as Colt, BCM, DD, Sionic's ect (4150CMV barrel's, HPT & MPT barrels & bolts, Carp 158 bolt carriers, gas keys staked, correct gas port diameter).
Colt Trooper's were going for not much more if anymore then the Ruger you mentioned and it's similar to it. Colt 6920's are going for really good prices now too. Look around, you can get a really good AR at a really good price right now.
Good luck, NYH1.