[Build Help] Looking to Improve Current Rig

I love my PC as-is, but it's starting to show its age. I'd like to be picking up 60 FPS on max settings in games like Warframe, Titanfall, and Diablo 3, but the current build just isn't cutting it. I was wondering what sort of recommendations this sub had for meeting that goal---since I don't want to just end up getting something that I think is better, without actually seeing improvement in my games.

My current rig is as follows:

PCPartPicker part list / Price breakdown by merchant

Type	Item	Price
CPU	Intel Core i7-950 3.06Ghz Quad-Core Processor	$149.95 @ Amazon
Motherboard	Asus Sabertooth X58	Unavailable
RAM	Corsair Vengeance 3x2GB	Unavailable
CPU Cooler	Corsair H60 54.0 CFM Liquid CPU Cooler	$54.99 @ Micro Center
Video Card	MSI GeForce GTX 760 2GB TWIN FROZR Video Card	$219.99 @ Micro Center
Power Supply	Rosewill 1000W 80+ Bronze Certified Semi-Modular ATX Power Supply	$109.99 @ Newegg
SSD	Samsung 840 Pro 256GB	Unavailable
Hard Disk	3 Disks, 7200 RPM, 1.5 TB, 750 GB, and 160 GB	Unavailable

If you guys could give me any suggestions that would give me the most performance impact, I'm open to pretty much anything. My budget is unlimited, as this is a long-term goal.

Thanks!