to buy a prebuilt pc or build my own?

Im looking to get a new gaming pc my budget is $1500ish i can go up or down just trying stay around there. I cant seem to pick parts on my own as im scared i'll get something dumb.

i was looking at a prebuilt pc site and this one caught my eye, let me know if its too overpriced or if it is a dumb idea. Im accepting any help plz.
*BASE_PRICE: [+1785]
BLUETOOTH: None
CABLE: None
CARE1: Professional Wiring for All WIRING Inside The System Chassis - Minimize Cable Exposure, Maximize Airflow in Your System [+19]
CAS: Cooler Master HAF Stacker 935 Gaming Case with Top Compartment for Extra m-ITX system, Water Cooling, or Storage Space
CASUPGRADE: RGB Multi-Color (16 color) LED interior light strip with Remote Controller [+15]
CC: None
CD: 24X Double Layer Dual Format DVD+-R/+-RW + CD-R/RW Drive (BLACK COLOR)
CD2: None
COOLANT: Standard Coolant
CPU: Intel® Core™ i7-5820K Six-Core 3.30GHz 15MB Intel Smart Cache LGA2011-V3
CS_FAN: Maximum Thermaltake Riing 14 Series High Static Pressure 140mm Case/Radiator Fan [+49] (Blue Color LED)
DOCKINGSTATION: None
ENGRAVING: None
FA_HDD: None
FAN: Asetek 550LC 120mm Liquid Cooling CPU Cooler - Extreme Cooling Performance (Single Standard 120MM Fan)
FLASHMEDIA: None
FREEBIE_CU: FREE $50 VISA Gift Card with all Intel X99 Based Desktops
FREEBIE_VC1: FREE! Metal Gear Solid V: The Phantom Pain Game Coupon [+0]
HD_M2PCIE: None
HDD: 2TB (2TBx1) SATA-III 6.0Gb/s 64MB Cache 7200RPM HDD (Single Drive)
HDD2: None
HEADSET: None
HS_HANGER: None
IUSB: Built-in USB 2.0 Ports
KEYBOARD: AZZA Multimedia USB Gaming Keyboard
MEMORY: 16GB (4GBx4) DDR4/2800MHz Quad Channel Memory (ADATA XPG Z1)
MONITOR: None
MOPAD: None
MOTHERBOARD: GIGABYTE X99-UD4 ATX w/ Intel GbE LAN, 4x Gen3 PCIe x16, 3 PCIe x1, 1x M.2, 10x SATA 6Gb/s
MOUSE: AZZA Optical 1600dpi Gaming Mouse with Weight Adjustable Cartridge
NETWORK: Onboard Gigabit LAN Network
NFC: None
OS: Windows 10 Home (64-bit Edition)
OVERCLOCK: No Overclocking
POWERSUPPLY: 600 Watts - Standard 80 Plus Certified Power Supply - SLI/CrossFireX Ready
RUSH: RUSH!!! READY TO SHIP IN NEXT BUSINESS DAY [+109]
SERVICE: STANDARD WARRANTY: 3-YEAR [3 Year Labor, 1 Year Parts] LIMITED WARRANTY PLUS LIFE-TIME TECHNICAL SUPPORT
SLI_BRIDGE: Standard SLI/Crossfire Bridge
SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO
SPEAKERS: None
TEMP: None
TUNING: None
TVRC: None
USBFLASH: None
USBHD: None
USBX: None
VIDEO: NVIDIA GeForce GTX 980 4GB GDDR5 PCIe 3.0 x16 (Maxwell) (Single Card)
WNC: None
WTV: None