With your budget you should be able to do very well. You could go with one of the high-end ARs such as a Noveske if you wanted to spend that full amount just on the rifle. There was a guy that posted about buying a Colt 6920 in Ft Worth for about $1300, so that will give you an idea.
If you want to research your purchase some more, here's some info you might find useful:
If you want a lower noise-to-signal ratio look at the website in my sigline. There is also a good resource in http://www.m4carbine.net
On Wevo we have an extreme use build thread. Lots of info on what to look for on heavy use defensive/duty weapons. You may not be looking at the AR for that, but it will give you an idea of the high endurance stuff and some of the important things to look for. Before you start pulling things out of here, be aware that a lot of this is going to be used on seriously used and abused carbines. It is good to see what the high end/high performance stuff is so you have an idea of what the top end is. http://www.weaponevolution.com/forum/sh ... .php?t=838
We also have a thread for explaining various members' carbines. The components they used, and why. A good point for seeing some very simple platforms that are still quite functional.http://www.weaponevolution.com/forum/sh ... .php?t=817
Here is the infamous "Chart" that gets a lot of people worked up. It runs down most of the major M4-type carbine producers and details where they meet the TDP (Technical Data Package) or MilSpec. It is not a value judgement, it is not an insult to anyone's mother, it is not a personal judgement on any individual. It is not totally inclusive, but Rob does keep it fairly up-to-date. The discussion in that post has a lot of basic info and explains certain features of the various components. Good info for a beginner to look at.http://www.m4carbine.net/showthread.php?t=6642
Here's some further expansion/explanation relating to the above Chart and some more good basic info.http://www.m4carbine.net/showthread.php?t=24397
A metric buttload of info links, all in one place.http://www.m4carbine.net/showthread.php?t=7009
As for hunting, it is quite serviceable for boar. Your load will make a difference. I don't how big the critters are in your area, but you may want a heavier/deeper penetrating load due to the gristle/fat/bone. Arfcom has a hunting forum, and there are a lot of hog shooters in my area that use an AR.