My landscape company uses both Dynascape software, and Google sketchup for most of our design work. I am researching the best laptop to purchase for this. I need to know if we should have our laptop custom built with custom features? How much RAM does it need -- we are thinking 7 to 8 mg. And finally what kind of processor and graphics card is best? We want to be able to work efficiently with high speed processing. Thank you, Sooz