So I'm fairly certain now that my 2009 13" MBP has an issue with the sudden motion sensor. Since it's no longer functioning properly, and my HDD has some minor corruption after a year of use (had the original replaced), I'm considering replacing it with an SDD. The thing is, I know absolutely nothing about buying or installing one. I'll probably get a friend of mine to install it for me. I currently have 2 GB RAM and a 2.26 ghz core 2 duo. The HDD is 160 GB, and I don't really want to go smaller than that. I'm in college, and this is my sole computer. I have 1 TB external for backups and old school files and another 500 GB for movies and such, both Western Digital. Any suggestions on an SDD that won't break the bank and will provide the storage I need? I use upwards of 140-150 GBs. Thanks!