Here is a Newegg wish list for a i3 build. http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=25308886
This should give you good performance in AH. The case has room in the back for cable management. The video card has good reviews
for being a 192 bit interface. The Antec power supply is made by Seasonic. I have used the Vulcan memory and seems to work well.
I always prefer a sound card over on board sound. I never had any problems with a Intel network interface card (NIC).
I trust a cooler with a back plate and screws over those cheap plastic push pin boxed coolers.
Windows 7 Home Premium allows up to 16 GB of memory. If you chose to install more (which in most cases is over kill) you will need
Pro or Ultimate.
Shop around, look for combo deals on the CPU and motherboard. Be sure to check shipping costs. It may be the lowest price but you may pay a premium
for the shipping. and to add what MrRipley said, you will need to know how to operate a phillips head screwdriver.