Hi there and welcome to the forum,
The on-board graphics should be more than enough for what you are proposing to do with the PC. Just something to bear in mind is that using the On-board graphics chip will take some of your RAM.
On a personal note I prefer to use a separate graphics card and if you do decide to go down this route then I would suggest you look for an ATI based card. You don't need to spend a fortune on this card and a low end 5 series card will more than fit the bill.
Thanks absic! That's exactly what I needed to hear. I'll get going using the motherboard, and may switch over to a separate card down the road! Thanks again!!