Mid-high End gaming rig, less than $1800.

Everything should fit. Though I have a few comments.
- Drop the H100; closed water loops like that aren't well worth the money since high-end air coolers such as the NH-D14, Phanteks, and Silver Arrow pretty much match its performance.
- You will see little to no difference between 1600MHz and 2133MHz of RAM, save yourself the cash. And get the Ares series for easier CPU cooler installation. The Ripjaws' tall heat spreaders will give you a hard time. There is no point at all for 16gb of RAM either. Your usage will barely even use up 8gb.
- Intel SSDs aren't that great either, kinda bad actually imo. Not to mention, it's heavily overpriced compared to other SSDs that outperform it.
- You can change the HDD for a Caviar Blue or a faster Samsung Spinpoint if you don't need the Black's 5-year warranty.
- Casing is a preferential thing, so I won't comment on that. It's a good case though, I believe.

Here's a revision of your original build.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($169.99 @ Microcenter)
CPU Cooler: Thermalright Silver Arrow CPU Cooler ($69.70 @ NCIX US)
Motherboard: Gigabyte GA-Z77X-UD5H ATX LGA1155 Motherboard ($179.99 @ Amazon)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($33.99 @ Newegg)
Storage: Samsung Spinpoint F3 1TB 3.5" 7200RPM Internal Hard Drive ($88.98 @ Newegg)
Storage: OCZ Vertex 4 128GB 2.5" Solid State Disk ($99.99 @ Newegg)
Video Card: Gigabyte Radeon HD 7970 GHz Edition 3GB Video Card ($413.78 @ NCIX US)
Case: Corsair 600T White Graphite ATX Mid Tower Case ($159.99 @ Newegg)
Power Supply: PC Power & Cooling Silencer Mk II 950W 80 PLUS Silver Certified ATX12V / EPS12V Power Supply ($100.43 @ NCIX US)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($15.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (64-bit) ($91.99 @ Amazon)
Total: $1424.82
(Prices include shipping, taxes, and discounts when available.)