Jaybet,
There are so many models and variations. Most are pretty good. It all depends on what you want to do with it. If it's just to join the AR club and you have no particular purpose, and not a lot of money, you can get a basic entry level model. in the $700-900 range. FQ has a good suggestion for a quick and ready-to-go version.
For starters, if you have a purpose in mind, such as shooting in NRA National Match, or 3 gun or varmint shooting, or CQC, then you might want to list the features that are most important and do some comparison shopping. First decision, do you want a old-school built in carry handle or a flat top. (Most will tell you get the flat-top, that you can add a carry handle to the top rail if you want one.) Then you need to make the impingement or piston decision. Go with the original impingement design. More aftermarket parts, more standard. Piston driven ones aren't without their problems, too.
My first AR, long before the current craze was a "carry handle" model from Eagle Arms (one iteration of Armalite corporate history). It's barrel is just a little to light weight and shots move a little when it gets hot. But if I had to carry it 10miles+ a day the light weight is a plus.
NOW: And what I'm getting 'round to, is that I built my second AR to get exactly what I wanted at a very low cost.
YOU can do this too and have fun selecting the parts to meet your needs and budgets.
I bought a complete upper with the barrel I wanted. Here's one similar, that's $390. There are less expensive ones, but I wanted the heavy bull barrel.
http://www.galatiinternational.com/product/MDB20320.htmlThen I bought a lower made by an up-and-coming local company, C3, that was on sale for $80.
http://www.semperfiarms.com/store/product/AR15-Lowers/c3-defense-standard-lower.php There are many companies that have lowers, stripped and assembled. I just wanted a local name on my gun. Parts kit, with trigger, and basic stock were less than $150. So for about $650 I have a gun that retails in the $1,000+ range, plus I bought it over a 3 year period. I don't have all the rails and tacticool stuff because I wanted a varmint AR.
You can do better, dollar-wise, for a basic model if you shop carefully. Then if you like it and as funds become available you can do upgrades to better suit your shooting needs.
We'll help step you through the process, but there are tons of websites and forum posting that will step you through it.