Hi people, I currently own a White Unibody (Late 2009) 13" Macbook; 2GB RAM, 2.26GHz, 256GB Hard Drive and Nvidia GeForce 9400m. I want to upgrade my Macbook now as i've had it for 2 years and want a change. I really like the portable aspect of the New 13" Macbook Air Base model. However, if i was going to buy it i would have to upgrade its RAM to 4GB instead of the base 2GB. I have a budget of £1200/$1400. What do you recommend? Obviously, i need to know whether the Macbook Air is a step down from the White Macbook or a GOOD upgrade; especially for the price im going to pay. Thanks, any input is appreciated.