If you REALLY want to spend money, here's my suggested list:
-Get an A-5. Go look at our photo galleries and pick a style that you want. With the right upgrades, you will be able to lay down some serious paint AND have a milsim look.
-Look in your local surplus store for camo clothing. If there is nothing you like there, go to
BDU.COM - Military Uniforms & Tactical Clothing by Propper
-you'll need some combat boots. Just go with what druid suggested, I don't know which brands are the best.
-Vest
-A mask that isn't bright and flashy
-SHEMAGH
but yeah, if you want to spend money go spend a while exploring
OPSGEAR