Hi all, posted this in another thread but I thought I'd break it out to get some more feedback. I'm trying to decide between a MB and a MBA. Work has told me to choose a laptop and I'd either go with the 1.86 MBA or the 2.4 MB upgraded to the 4G RAM and the SSHD. I really have no need for an optical drive, and dont care that much about the other ports, and I usually bike or walk to work so the lesser weight of the MBA would be good, on the other hand the extra processing power and new trackpad on the MB would be nice. Most of the work on it will be surfing the internet, SSHing into remote servers, and giving presentations, with a bit of visualization work as well. Any suggestions?