I've got a two year old MBP...the 250 GB keeps filling up, and I really want to get some more room in there. Anyone have any experience with good (or bad) replacement disks for the main drive? I was also considering this option from Lifehacker: http://lifehacker.com/5541774/how-to-install-a-solid+state-drive-in-your-macbook I rarely use the CD slot, so replacing that with a second hard drive and using an external CD/DVD drive instead sounds good. But in the comments section, it sounds like this might have some side effects. Has anyone tried this?