I shot an AR and got BRD (black rifle disease) too. Now I have a Smith & Wesson M&P15A that is turning into a monster.
I say go ahead and get one! If cost really is an issue, put it on lay-away (like I did), and then enjoy the fruits of your patience. Plus, you can always invest the $130 down the road for a drop in .22LR conversion bolt. Thats my plan anyways after I am done adding the goodies I want to my baby.