G.SKILL Ripjaws Z Series 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL10Q-32GBZL - $129.99 FS!!!

I almost went with this. I just bought 16gb a couple days ago. Not even in and considering sending it back and doing 32....

I was also in a similar situation. I figured 16 gb of memory would be sufficient for my workstaion (3ds max, autocad, adobe, revit, etc). I currently have 12 gb of memory in my system and have maxed out my memory on multiple occasion, so I made the conclusion that it would not hurt bumping it up to 32 gb, as I am building a new x79 system with a gen 3 i7 processor. The x79 systems run best with quad channel memory, so I was in the situation of choosing 4x4 = 16gb or 8x4 = 32gb. In the end, I decided that going with 8x4 = 32 gb would be the best long term solution (more future proof) as I feel 8 gb sticks will obviously become the norm in the near future.

Good ram - got this about 3 weeks ago (at $140). Probably should have waited, but 32GB of ram is excellent to have!