I have an early 2011 MBP, and after a year of heavy use it's getting slow. E.g. it takes a minute to boot up and Chrome takes 30 seconds to launch after that, along with general lag. Almost replaced it with the rMBP this year, but had to return the rMBP because of blurriness in MS Office/etc. I'm considering getting a 128GB Crucial M4 to speed up the computer. Is it worth the hassle to reinstall everything? I have a 500 GB 5200RPM HD now. Thanks.