Agree with Photon. There are new processors coming out and new graphic controllers which make it pretty compelling to hold off for as long as possible. I would also think there would be a big push of the new gear in August for back to school.
Another option is to look at some of the smaller laptops. There are a number of ~ 13 inch laptops which have more processing power, better graphics, etc, but are still light weight. Cost on many of these is within reach of the higher end/more expense netbooks. Downside on these is battery life usually suffers.
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