$1500 NZD is okayish amount for a fairly okayish computer + monitor.
PCPartPicker part list /
Price breakdown by merchant
CPU: *
Intel Core i3-6100 3.7GHz Dual-Core Processor ($188.00 @ 1stWave Technologies)
Motherboard: *
ASRock H110M-DGS Micro ATX LGA1151 Motherboard ($100.00 @ Paradigm PCs)
Memory: Crucial 8GB (1 x 8GB) DDR4-2133 Memory ($55.00 @ 1stWave Technologies)
Storage: *
Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($85.64 @ Aquila Technology)
Video Card: Sapphire Radeon R9 390 8GB Nitro Video Card ($458.85 @ PB Technologies)
Case: *
Zalman Z3 Plus White ATX Mid Tower Case ($83.68 @ Wiseguys)
Power Supply: Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply ($105.00 @ Paradigm PCs)
Optical Drive: *
LG GH24NSC0 DVD/CD Writer ($31.00 @ 1stWave Technologies)
Operating System: *
Microsoft Windows 8.1 OEM 64-bit ($136.00 @ 1stWave Technologies)
Monitor: Asus VP228H 21.5" 60Hz Monitor ($198.99 @ PB Technologies)
Total: $1442.16
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2016-06-08 09:05 NZST+1200
For those saying an i3 would hold it back, or that and i5 and a lesser card is better, you're wrong.
http://www.3dmark.com/compare/fs/8382771/fs/8272699/fs/7782283
Also he doesn't really have any better PSU choices, and the CXM is okay as long as he doesn't OC.