Which SSD is better?

Kingston SSDNow V300 240GB
ADATA SP600 256GB 2.5"
Crucial M500 240GB

I am looking to replace my laptop HDD with an ssd and am looking into one of these three. I will be storing most files on an external drive while this will be mainly for OS, programs and video editing files. Which of these three would be better to purchase (All will be going on sale for $100)?

Thanks in Advance!