I'm currently looking around for a nice AR to add to my collection and I saw a Bushmaster M4 for sale at $800.  I've only had experience with the M16 at Basic Training, so would I be getting a similar experience with a Bushmaster product or should I look somewhere else?  Also, I'm conflicted on whether or not it should be a M16 or M4 style rifle, I'm of small stature and would like something affordable and also easy to handle so that my family can enjoy shooting also.

http://www.bushmaster.com/shopping/weapons/bcwa3f16m4.asp

Go with the carbine if you are looking at something for everyone to shoot.  

If you are looking for a carbine, try to find one that is a flattop, and that has a removeable carry handle.  This will allow you to use optics like the military, LE, or all the cool people.  On a serious note, the optics make a good shooter great, and a great shooter fantastic.  Sooner or later, you will want to upgrade, and its easiest and cheapest if you just get the flattop to start.