I have an 830 series SSD. It's from the previous generation of SSDs, but AFAIK it was one of, if not the actual fastest on the market at the time. I highly recommend it, if you can find one at at decent price - I paid £155 for a 256GB in November 2012.
esco_sid, you seem to be confused between the 830 and 840 series. There is no pro version of the 830, and the 830 uses MLC not TLC NAND, so the 830 has better reliability than the 840 (non-pro).