i had the 13 mbp2.26 i liked it the battery was great etc but i hate the trackpad. Especially because i use windows frequently. I realized that the MBA has a trackpad button . I was wondering if the performance will be snappy for what i do. I watch movies on ninjavideo (divx). will be typing alot, using word and pages and keynote. I also found the 13 mbp a little too heavy for daily carrying considering i have 15lbs of books. I will be getting the 1.86 MBA rev c, with the ipod touch. Will the 4200rpm suffice can i replace it with an SSD later and how will this air perform with Snow Leopard. I also have a desktop for gaming etc.