I saw that Crucial is having a sale and there are two drives at $199 and $399, 128gb and 256gb, respectively... I'm a noob in regards to this topic and have a couple of questions.. would it make sense for me to replace my entire stock 250gb HDD with a similarly sized SSD? Then should I replace my Optical Drive with an Optibay tray and use my 250gb HDD as a storage drive? Anyone that has experience with an Optibay system have any comments on this? or does it make more sense to simply go for an SSD just big enough to fit my OS and some APPS (what would that size be for MAC OS X?)? Also, would anyone be able to suggest a couple of decent SSD's that they have experience with, etc? Sorry for such a long post - simply trying to acquire info/spark a conversation on the topic...thanks in advance!