Netbook GPU question? Intel NM10 Express vs Intel Graphics Media Accelerator 3150

I need to get a netbook that has amazing battery life and can play youtube videos basically flawlessly. Hi-Def is not a concern to me, i just want to be able to play a basic low quality youtube video flawlessly. I was wondering what is the difference between the NM10 and the 3150? Which one is better and how big if the difference? I am trying to pinch pennies here because I have a very limited budget. I have found a dell and an acer on sale but it has a 3150 GPU and not the NM10 I can't find benchmarks or information anywhere on whether it can play youtube videos flawlessly and what exactly the differences are thanks. I would like to maybe play some ancient flat games too if possible. I don't really need to know of any models I just need to know the difference Thanks. Is it worth 50 more dollars to get the NM10 Express instead of the GMA 3150? I did not know it was possible to NOT have NM10Express on the N450 processor because I thought it was integrated in? Yeah I am basically confused urgent help please, I will be placing the order before tuesday.