I bought a 15 inch classic MBP a few months ago. I had never used a Mac but was tired of crappy quality PCs and the inevitable viruses and slowdowns. I can say that I am thrilled with my decision and don't think I'll ever go back. I have started doing a lot of Handbrake encoding as I try to build my digital media library and have been playing a lot of flash-heavy games and noticed some lags on switching windows and beach balls here and there. Even got a situation where the mac froze entirely (was able to move pointer but nothing would click). I think the main problem is I need more RAM as I have page outs and swaps around 2GB from just a day's use. Anyway, I want to be absolutely sure I buy the exact right type of RAM. I have the mid 2012 2.3GHz 15inch MBP with 4GB of 1600Ghz DDR3 RAM. I thought I might as well go ahead and get the 16GB for a few dollars more even if I dont truly need it -- it can't hurt. I am looking at Crucial: Crucial 16GB Kit (8GBx2) DDR3 1600 MHz (PC3-12800) CL11 SODIMM 204-Pin 1.35V/1.5V Memory Modules For Mac CT2C8G3S160BM Is this the right kind? I'm pretty sure it is, but on one of the Macrumors guides it says you shouldn't use CL11 Ram on 2011-2013 Ivy Bridge mbps. It's so confusing! I would like to get one of the generally accepted brands like Crucial and would prefer to buy from Amazon as I am a Prime member. Price isn't a big concern as long as it's under $150. Would appreciate your recommendations.