What DevL said. [:D]
I will, however, add that a valuable resource can be found in your Hometown Forum. Click on the Hometown button in the upper right-hand corner, find your state/area and introduce yourself. I've meet many great people in my area thanks to this site. We have all been willing to let others try things to which they might otherwise not have access. For example, around here there aren't many dealers (or gun show even) where you can actually see an ACOG, RAS or many of the other higher-end accessories/optics. Between our little "Georgia gang" and the Alabama guys we occasionally visit, you'll see every type of optic, stock, grip, rail system, light, etc. you can imagine. It really helps if you can see and use things for yourself before you buy. What may work for someone else might not be ideal for you.
BTW, welcome to the site!