I'm about to order a new late 2011 15" MacBook Pro, but I am wondering whether to buy one with an Apple supplied SSD, or fit my own. I was looking at the Crucial 512GB M4, but their forums show lots of issues, and I'm unclear as to whether it's all working nicely now, or not. Basically, I want one without beach-balling issues and with TRIM support. Are there any 3rd party SSDs that work without issues? Cheers!