I love the air .. love the battery life etc of ones I had in the past. I was given a 13" rmbp for xmas but I think I want an air instead. I mainly will use it for web .. email .. my online business and spreadsheets etc. Would the base model 13" air be fine or should i go with an 8gb version. The rmbp I have is i5, 8gb, 256. Haven't opened it yet.