Hello everyone, I am about to purchase my first mac and have narrowed my choice down to two: 13" MBP 2.3GHz i5, 4GB, 320GB HD or a 13" MBA 1.7GHz i5, 4GB 128GB HD. I would like the machine to last me a while, so the thing that is giving me second doubts about the MBA is that you can't upgrade it. I've also read the the SSD in the air's are a better choice over the HD's in the MBP in terms of speed and reliability. I know you can upgrade the RAM in the MBP, but could I also install a SSD down the road as well? Are there third party SSD's out there? I'm tired of Windows hijinx (I had to fix a "black screen of death" problem in order to post this thread!). Any advice would be appreciated, thanks.