These drives have great ratings on Amazon. About the RAM upgrade: I have an early 2011 MacBook Pro 13", originally it had 2x2 for 4 gigs total. I replaced that with G.Skill 4x2 for a total of 8 gigs memory. Works wonderful. So, I have no doubt you can do 8x2 in your 15". My 13" would have supported that, but I did not need that much.
Not for what you're looking to do. It's a Sandy Bridge machine, so it can run 16GB (2x8) RAM and as long as you put the SSD in the original HDD slot (and not the optibay) you'll be fine with that upgrade as well.