I don't think the llano base is a great idea. The graphics are relatively good, but when you add a proper discrete graphics card, it will be underpowered compared to other options.
What is your budget, and what parts do you need?
You might start by looking at this $500 budget build from Tom's. If your budget is less, then save up a bit intil you can do a proper job.http://www.tomshardware.com/reviews/gaming-pc-do-it-yourself-geforce-gtx-560,3216.html