I am currently in the market for a new laptop. I have seriously been looking at the new MacBook to go alongside my MacPro. However I was thinking earlier that I no longer really push the MacPro to its limits (I have finished the work I was on when I got the machine) so maybe I could ditch the MacPro and it's Dell 20" monitor and go for the 2.8GHz MBP + 24" monitor. How much of a performance loss would I see? 10%, 25%, 50%? I know that is a difficult question but any ideas? Thanks.