Looking for a GPU to finish my first build

[Remusion]

Hey there. So I've tinkered with friends builds and whatnot but this is going to be my first build completely from scratch and I was looking for some opinions. The gpu I was going to get, Sapphire Tri-X OC R9 290, has been rising insanely in price from what it was just a few weeks ago so I'm looking for alternatives. I'd like something fairly powerful, as I'd like to not have to worry for a while to come about low fps at very high or ultra settings while gaming.

I'm open to any and all suggestions, so please if you have one toss it at me. Feel free to make suggestions about the other components as well. Here's my build so far :

(Also I don't have a case listed as well, I haven't really looked for anything appealing yet)

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($254.79 @ DirectCanada)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($31.06 @ DirectCanada)
Motherboard: Asus Maximus VI Hero ATX LGA1150 Motherboard ($217.13 @ DirectCanada)
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1866 Memory ($163.98 @ Newegg Canada)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($64.75 @ Vuugo)
Power Supply: Corsair Professional 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($159.99 @ Memory Express)
Optical Drive: LG WH14NS40 Blu-Ray/DVD/CD Writer ($71.75 @ Vuugo)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($93.87 @ DirectCanada)
Total: $1057.32
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-24 22:10 EST-0500)

 

[darksoul1]

When i built my computer i checked http://www.videocardbenchmark.net/high_end_gpus.html hope it helps

 

[maxiim]

GTX 780? As far as the case, check out NZXT H440 , I hear good things about that case