Need help with building new PC

[derpgaming]

Hey guys!

I am new to building computers and literally have no idea as to where I need to start. I used to raid off a laptop with an i5 processor and it's lasted me quite some time I'll tell ya, but I have nice tax returns and money to spare and I want to jump on the PC train before WOD comes out! I have a 850$ budget and I raid 25 mans in WoW, so would kill for a nice build that can handle raiding and can run WoW as best as 850$ can get me. I've been researching a bit and I definitely think I want an i5 CPU for sure, but as I said already, complete noob here!

Budget: 850$ can go a bit over if needed
Games / Settings Desired: WoW at best settings possible, 25 man raiding
Country: USA
Do you need an OS?: Nope
Do you need peripherals (e.g. monitor, mouse, keyboard, speakers, etc)?: Nope, monitor resolution: 1920x1080

Don't care how the case looks, it could be the funkiest thing ever, I'd probably love it

[Deleted]

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($228.99 @ SuperBiiz)
Motherboard: MSI Z87-G41 PC Mate ATX LGA1150 Motherboard ($98.59 @ NCIX US)
Memory: Crucial Ballistix Sport 8GB (2 x 4GB) DDR3-1600 Memory ($59.99 @ Microcenter)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Disk ($82.95 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: Asus Radeon R9 270X 2GB Video Card ($223.99 @ Staples)
Case: Silverstone SST-RL01B-W-USB 3.0 (Black) ATX Mid Tower Case ($35.98 @ Newegg)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($55.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.98 @ OutletPC)
Total: $866.44
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-18 06:40 EST-0500)

Comes to 900 bucks before rebates, and it should be perfect for your needs.