Another article about the Intel 520 suggesting it will not have a SandForce controller:http://thessdreview.com/latest-buzz/intel-ssd-520-series-possibly-not-sandforce-based-ssd/
Funny Jack, I just came upon that website above concerning that it might not have SF. I guess the true fact is that we will know when it's actually released or if Intel throws us a bone!!
I was all set to buy the Crucial M4 when I ran into waiting for the new AMD video cards and then noticed Intelhad the 520 SSD coming out. I see Intel's SSD's are more expensive than the others...but it's Intel.
Jack, stick with the M4 or wait to see if Intel releases the 520? Again, the M4 is out of stock! My luck!