I am admittedly new to recording - sort of - so bear with me.... I have a MBA running 4 GB w/an external hard drive of 200GB. About half the space of each is used up as is. What, if you had the money, would be the perfect laptop configuration in terms of RAM, storage, and processor speed? I am planning on getting a new laptop for everything, but I don't want to give away an arm and a leg.