Yesterday I ordered a SandDisk Extreme II 480GB SSD off of amazon because it was the gold box daily deal. It was priced at $230, though the order came out to $246 after sales tax. However, today I find that B&H has the Crucial 512GB MX100 for $199 shipped (no sales tax here). I've seen a lot of benchmarks on these drives, but being new to SSD's it's hard for me to make heads or tails of all the data (Performance wise, is 16nm NAND better than 20nm?). Should I cancel my amazon order and go with the Crucial SSD? Is the Extreme II worth $47 more with less storage?