Hi I work mainly with the EXS these days and am thinking of upgrading. I've been following the logic and exs lists, but one thing has not been discussed that I really need to know... My G4 400 becomes very sluggish when pushed beyond half load. I would like to get a laptop but I'm concerned that this issue only goes away with dual processors. Can anyone comment on how hard you can push a dual proc machine compared to a single proc. From previous posts it is my understanding that you can virtually max out a dual proc and the user interface behaves the same as with no load. Is this accurate? BTW I am running OS 10.2.4 I don't suppose there will ever be dual proc laptops due to power consumption?? Tom