I bought acer aspire v5 573G notebook two years back. Its awesome. It had got 2GB of ran but it works flawlessly in it. It is capable of giving more performance than the other laptops or notebooks with 2GB of RaM. The best thing I like about is its battery backup.
It can readily last upto 4-5 hours on normal usage and on playing heavy games it lasts for approx 2 hours. The biggest problem I faced in this notebook is that it many times does not detect the hard drive many times during bootup and shows errors like Pxe broadcam error. Insert any notable device and pores any key. This problem is very much irritating. Otherwise its a very good buy.