Custom watercooled pc built vs pc pre built pc

I thinking about a custom watercooled pc pre built or diy here the spec
From cyberpowerpc
*BASE_PRICE: [+2399]
BLUETOOTH: None
CABLE: None
CARE1: Cooler Master Thermal Fusion 400 Extreme Performance CPU - Thermal Compound Optimized for Thermal Dissipation [+10]
CAS: IN WIN 303 Mid Tower High Air Flow Gaming Case w/ Tempered Glass Full Size Window (White Color)
CASUPGRADE: None
CC: None
CD: None
CD2: None
COOLANT: Thermaltake High-Performance C1000 (Yellow) Opaque Vivid Color Coolant Series
CPU: AMD Ryzen 7 1800X 3.6GHz [4.0GHz Turbo] Eight-Core 16MB L3 Cache 95W Processor
CS_FAN: NZXT HUE+ Advanced PC Gaming Lighting Control w/ 3x NZXT Aer RGB 140mm Case Fans [+148]
DOCKINGSTATION: None
EVGA_POWER: None
FA_HDD: None
FAN: CYBERPOWERPC HydroFluxe Custom PETG Hard-Tube Water Cooling kit 360MM [+28] (HydroFluxe Ultimate - Liquid Cooling for CPU + 3 Video Card [+7])
FLASHMEDIA: INTERNAL 12in1 Flash Media Reader/Writer (BLACK COLOR)
FREEBIE_VC1: FREE! Honor or Ghost Recon: Wildlands [+0]
HD_M2SSD: 512GB Intel® SSD 600p Series PCIe NVMe M.2 SSD - 1800MB/s Read & 560MB/s Write (Single Drive)
HD_PCIE1X_SSD: None
HDD: 3TB (3TBx1) SATA-III 6.0Gb/s 64MB Cache 7200RPM HDD (Single Drive)
HDD2: None
HEADSET: None
IUSB: Built-in USB 2.0 Ports
KEYBOARD: AZZA Multimedia USB Gaming Keyboard
MEMORY: 8GB (4GBx2) DDR4/2400MHz Dual Channel Memory (Kingston HyperX Fury [+15])
MONITOR: None
MOPAD: None
MOTHERBOARD: ASUS ROG Crosshair VI Hero AM4 ATX w/ RGB, Intel LAN, 3 PCIe x16, 3 PCIe x1, 8 SATA3, 1 M.2 PCIe [+172]
MOUSE: CyberpowerPC Standard 4000 DPI with Weight System Optical Gaming Mouse
NETWORK: Onboard Gigabit LAN Network
OS: Windows 10 Home (64-bit Edition)
OVERCLOCK: Pro OC (Performance Overclock 10% or more)
POWERSUPPLY: 1,000 Watts - Standard 80 Plus Gold Power Supply
PRO_WIRING: Professional Wiring + [White] Phanteks Premium Extension Cables sleeved set [24Pin MB + 8Pin CPU + 6+2 Pin VGA] [+39]
RESERVOIR: None
RUSH: Order AMD Ryzen Gaming Rig Now and Will Ship on March 2 or After
SECURITY: McAfee AntiVirus Plus (Factory Pre-Install [Digital Version])
SERVICE: 3 Years FREE Service Plan (INCLUDES LABOR AND LIFETIME TECHNICAL SUPPORT)
SLI_BRIDGE: None
SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO
SPEAKERS: None
TVRC: None
USBHD: None
USBX: None
VIDEO: GeForce® GTX 1080 8GB GDDR5X w/ Phanteks Premium RGB Full Cover GPU Waterblock [+325] (Single Card)
VIVE_HEADSET: None
WARRANTY: STANDARD WARRANTY: 1 Year Parts WARRANTY + ONE (1) YEAR SHIPPING [+10]
WNC: None
WTV: None
_PRICE: (+3153)
_view_: {87FEEC2F-F99D-407E-8C81-48DCBE6A456D}
_load_: 2/23/2017 3:33:50 PM
Total $3,153.00
Can I get cheaper way than pre built