Like some insight on a new replacement system

I know my software pretty well, but I'm not that great when comes to hardware tech. This is my configuration based on my needs and without having too much gingerbread items that would not benefit my playstyle for a system. Any changes or feedback will be appreciated.

Budget:
At least under $3,000

Expectations:
Top game performance for FPS titles, but mostly RPG, RTS, and online MMO gameplay. Can view stream videos online and provide decent performance for Blu-Ray playback.

FYI - I'm not a competitive FPS player, I play casually. So getting a system decked out for max performance to give me an edge against other players is not needed. If I can have decent hardware to run Ultra graphic settings at 60fps and above without any hardware issues that impacts my gameplay experience, then I'm happy.

I plain to upgrade my current 1080p monitors with 4k monitors down the road later this year or early next when the price comes down.

Also, I may get another card for SLI, but not so sure based on benchmark reviews. I currently have two GTX 670 cards in SLI. Is it a must to have SLI 900 series cards or can you get great performance with only one card? Again, I play FPS titles casually; mostly play RTS and MMO games. If this is going to be a overkill for such titles, then I don't want to throw in extra money when I'm not going to take full advantage of it.

Usage:
Mostly gaming and Blu-Ray movie playing. For gaming I mainly play RTS and RPG titles, and some FPS titles. I do play graphic heavy games like Cyrsis sometimes, but only for the single-player experience and not multiplayer. My multiplayer experience for FPS titles is usually games like Battlefield.

Saved Ticket #: 1130754

Specifications:
Chassis Model: Special Deal Hot Seller - Digital Storm Apollo
Exterior Finish: - Standard Factory Finish
Trim Accents: - Standard Factory Finish
Processor: Intel Core i7 4790K 4.0 GHz (Codename Devils Canyon) (Unlocked CPU) (Quad Core)
Motherboard: ASUS MAXIMUS VII HERO (Intel Z97 Chipset) (The Ultimate Power Platform) <br><strong></strong>
System Memory: 16GB DDR3 2133MHz Digital Storm Certified Performance Series (Highly Recommended) (Hand Tested) <br><strong></strong>
Power Supply: 850W EVGA SuperNOVA <br><strong></strong>
Expansion Bay: - No Thanks
Optical Drive: ASUS Blu-Ray Player/DVD Writer (Play Blu-Ray and Burn DVDs) (Model: BC-12B1ST) <br><strong></strong>
Storage Set 1: 1x SSD (250GB Samsung 840 EVO) <br><strong></strong>
Storage Set 2: 1x Storage (1TB Western Digital - Black Edition) <br><strong></strong>
Storage Set 3: - No Thanks
RAID Config: - No Thanks
RAID Card: - No Thanks
Internet Access: High Speed Network Port (Supports High-Speed Cable / DSL / Network Connections)
Graphics Card(s): 1x NVIDIA GeForce GTX 970 4GB (EVGA ACX Cooler Edition) <br><strong></strong>
Sound Card: Integrated Motherboard Audio
HPC Processor: - No Thanks
Extreme Cooling: H20: Stage 2: Corsair H100i 240mm Radiator Liquid CPU Cooler (Extreme-Performance Edition) <br><strong></strong>
H20 Tube Color:- Not Applicable, I do not have a FrostChill or Sub-Zero LCS Cooling System Selected
Chassis Fans: Standard Factory Chassis Fans
Internal Lighting: - No Thanks
Airflow Control: - No Thanks
Chassis Mods: - No Thanks
Noise Reduction: - No Thanks
LaserMark: - No Thanks
Boost Processor: Stage 1: Overclock CPU 4.0GHz to 4.4GHz
Boost Graphics Card(s): - No Thanks, Please do not overclock my video card(s)
Boost Memory: - No Thanks, Please do not overclock my memory
Boost OS: - No Thanks, Please do not tweak the services on the operating system
Windows OS: Microsoft Windows 8.1 (64-Bit Edition)
Recovery Tools: Windows Recovery Toolkit (Bundled with Windows CD)
Virus Protection: FREE: McAfee AntiVirus Plus (1 Year Service Activation Card) (Not Pre-installed) ($35 Value)
Office: - No Thanks
Game: - No Thanks
Display: - No Thanks
Surge Shield: - No Thanks
Speakers: - No Thanks
Keyboard: - No Thanks
Mouse: - No Thanks
Portable Gaming: - No Thanks
Branded Gear: - No Thanks
Priority Build: - No Thanks, Ship Within 10-15 Business Days After Order Is Successfully Processed
Warranty: Life-time Expert Care with 3 Year Limited Warranty (3 Year Labor & 1 Year Part Replacement)