are you using the onboard gpu or using a discrete video card? if you are using a separate video card, then the i5 is the way to go. if you're going for the onboard graphics then the a10 has MUCH better graphics and is your choice.
if you would like some help picking a system you can give us a budget and what you need to buy and we will be happy to help. sometimes what you may be thinkking ends up more expensive than another option which is just as good or better.