I have the Samsung 470 SATA 2 3Gb/s 256GB ssd in my personal rig. I've had it for 3 months now. It performs as expected and there have not been any problems or issues. The newer Samsung ssd's are just as good, if not better.
The following Tom's Hardware forum thread will probably answer all of your questions, especially if you follow the links and read the technical reviews:http://www.tomshardware.com/forum/278902-32-samsung-256gb-maxiops-patriot-wildfire-corsair#t1900127