Experience with Llano?

I've decided to build a simple HTPC for my wife to function as an internet, movie (Blu Ray), and music machine. I am stuck, however, on which CPU route I should go in.

I recently built a budget office machine for my father using a Pentium G620. While building it, I played around with the G620 and was impressed with its abilities. I didn't get a chance to really test its graphics capabilities, however, but they were more than enough for what that machine would be used for.

Now, I am torn between placing a Sandy Bridge Pentium and an old video card I have lying around (Geforce 6600GT), or going with a Llano processor, with which I have no experience. The system will be solely for her to surf the internet, queue up YouTube videos, play Blu Ray movies, and play music. Nothing fancy and no gaming (unless I decide I want to dust off the old Everquest account and play it on the big screen  ). I'm trying to keep cost down since this will be such a simply used system.

My question is which route to go in. G620 and old video card (or integrated graphics, since I'm not really sure what the limitations are), or Llano (less powerful and older than Sandy Bridge, not that it might matter for this use)? The G620 and A4-3400 are both $70 on Newegg, so I'm using that as a jumping off point.