you want switch the gskills for some low profile ram.http://www.newegg.com/Product/Product.aspx?Item=N82E16820148662
they fit under after market heat sinks.
want toss the intel cpu heat sink and use a evo 212..works a lot better under load.
you need a hard drive and or a ssd if you want fast boot times and a copy of windows.
first build pick up a disosable wrist stap..tube of thermal paste..two extra sata cables...look on the mb guild to see if they need to be straight endded cables or bent 45 ones. most mb ship with one or two sata cables. i also pick up on new build a small set of computer case screw kits. the 10.00 ones that have extra screws for standoffs and hard drives. if not go to you local hardware store pick up a small bag of hard drive and case screws. also at the hardware store pick up a jug of plastic tye wraps or some velco wire wraps for cable management.