For those of you who may not know, I have a Crucial M4 128GB in my MBP '11 13-inch. The latest firmware patch, which has worked for most, has improved my system (although I barely tested the drive on the original firmware); yet, my system is still afflicted by the sporadic beach ball, freeze-ups on occasion. If I'm plugging away on something for several hours, I can expect a few annoying beach balls to punctuate long stretches of solid performance. Particularly annoying if it occurs in iTunes, the song just stops. Despite the speed, I can't endorse this computer to DJs or husbands who like to look at dirty websites while their wives are in the other room. Like on the display, the beach balls in your spouse's mind will be spinning if the drive fails you in one of those moments. For these reasons, I have considered the venerated Samsung 470. But, in spite of how solid a drive it is, I prefer to stick with a SATA III drive. And, the Crucial M4, seems to be the most reliable offering (for 6GB/s) at the moment. Even though benchmarks are only so meaningful, I prefer to take advantage of my computer's SATA III compatibility. What do you guys think I should do?