So I've got a MBA 1.6 GHz Intel Core 2 Duo, 2GB 667 DDR2 SDRAM. (Not sure wich rev this is). My 80GB Samsung drive is failing on me (put in by apple during warranty period, after the previous one failed). After two fails, I'm done with normal harddrives, and going for a SSD. I don't need more than 80gb though. So my question is: 1. Which harddrive do I buy, and where do I get it? 2. Is it really difficult to swap them myself? Any links to guides..? Thank you so much for answers.