You would need to refine your idea of performance first I think. It basically comes down to which GPU you want. If you can live with the 8400m, then you can go with the XPS M1330 (13.3" screen at 1200x800). You could also get Dell's new 1420 which is a 14.1" screen at 1440x900 and also has the 8400m. If you want the 8600GT, then you have to go with at 15.4" laptop, the smallest of which would probably be the Macbook Pro.