Can anyone check parts before I order?

Solution
First thing, lose the Raidmax psu. That brand is notoriously bad. Get yourself a nice Antec, Corsair, Seasonic, or XFX psu instead.
Second, if you're planning to get a discrete gpu, you might think about getting an fx-series cpu instead of an apu.
I can't quite tell whether that ssd tray works as a 2.5 inch to 3.5 inch adapter, but the rest of your parts seem okay to me.
 
I think you'll be better off with this.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($114.47 @ OutletPC)
Motherboard: ASRock 990FX Extreme3 ATX AM3+/AM3 Motherboard ($109.99 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($86.99 @ Newegg)
Storage: Crucial M4 64GB 2.5" Solid State Disk ($86.30 @ SuperBiiz)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ Newegg)
Video Card: Gigabyte Radeon R7 250 2GB Video Card ($89.99 @ Amazon)
Wireless Network Adapter: Asus PCE-N15 802.11b/g/n PCI-Express x1 Wi-Fi Adapter ($27.98 @ Best Buy)
Case: NZXT Source 210 Window ATX Mid Tower Case ($44.99)
Case Fan: NZXT FZ-120mm LED 59.1 CFM 120mm Fan ($11.99 @ SuperBiiz)
Case Fan: NZXT FZ-120mm LED 59.1 CFM 120mm Fan ($11.99 @ SuperBiiz)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX US)
Optical Drive: LG WH14NS40 Blu-Ray/DVD/CD Writer ($49.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($84.98 @ OutletPC)
Other: Rosewill RCR-IC001 40-in-1 USB 2.0 3.5" Internal Card Reader w/ USB Port / Extra Silver Face Plate ($14.99)
Other: NZXT CB-LED10-BU Sleeved LED Kit - Blue, 1 m ($13.99)
Other: Vantec NexStar SE MRK-515ST*C 2.5" SSD/HDD Tray for NexStar SE ($8.99)
Total: $867.61
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-11 22:00 EST-0500)
 
Solution