Need suggestion's on motherboard, $1100 budget for friend

I'm debating between a MSI-Z77-GD65 for $140 after rebate or GD55 for $125 after rebate, a Gigabyte Z77-UD3H for $140, or the Biostar Z77XE3 For $90 after rebate. What motherboard would be easier to overclock with and worth the money?
Also im not quite sure which mechanical keyboard I should get him, He'll be using it mainly for gaming and school. Any suggestion is appreciated. thank you!

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: Sapphire Radeon HD 7870 XT 2GB Video Card
Case: NZXT Phantom 410 (Black/White) ATX Mid Tower Case
Power Supply: SeaSonic X Series 850W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer
Monitor: Asus VH236H 23.0" Monitor
Mouse: Logitech G500 Wired Laser Mouse
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  1. Best answer
    As you are getting a 850W PSU, then I infer you want to CrossFire the cards, so get the MSI Z77A-GD55, as it has 2 PCI Express 3.0 x16.

    The Ultimate Guide to your First Mechanical Keyboard
  2. Thank you!
  3. first of all, you will never need 850w with 2 of those cards

    second of all, amd cards have runt framing issues when crossfired, making half of the frames put out not complete frames

    third, the asus z77-v LE PLUS is 124.99 after a MIR and is built way better than the gd55
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