I just got the unibody macbook today and was looking into a skin or case. I usually do not like cases since they just alter the original design and I am terribly afraid of skins because of the water issue. Phone skins I can deal with, but there are way too many openings on a laptop. I'll mainly be taking this to and from school only when I need it. Other than that, it will stay at home on my desk resting on a rain design mstand. Would a sleeve suffice in my case?