Questions regarding this build

[Deleted]

Case: CORSAIR CARBIDE SERIES™ AIR 540 GAMING CASE
Processor (CPU): Intel® Core™i5 Quad Core Processor i5-4690K (3.5GHz) 6MB Cache
Motherboard: ASUS® Z97-PRO GAMER: ATX, USB3.0, SATA 6GB/S, SLi, XFIRE
Memory (RAM): 16GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz (2 x 8GB)
Graphics Card: 4GB NVIDIA GEFORCE GTX 970 - 1 DVI, 1 mHDMI, 3 mDP - 3D Vision Ready
1st Hard Disk: 250GB Samsung 850 EVO SSD, SATA 6Gb/s (upto 540MB/sR | 520MB/sW)
2nd Hard Disk: 1TB WD CAVIAR BLACK WD1003FZEX, SATA 6 Gb/s, 64MB CACHE (7200rpm)
Power Supply: CORSAIR 750W CS SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET
Processor Cooling: CoolerMaster Hyper 212 EVO (120mm) Fan CPU Cooler
Operating System: Genuine Windows 8.1 64 Bit - inc DVD & Licence
Monitor: BENQ RL2455HM 24" LED GAMING MONITOR

The build in questions is for:

- Daz 3d image Rendering.
- 20man Multiboxing.
- Streaming.
- General Gaming.

1) Is this build good for the things I intend it to use?
2) Is it worthwhile to take a 4k monitor for this?
2a) Is there any modifications needed to use the best of any 4k monitor?

[Raphtheone]

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OP updated. Seems you can only see your own quotes on that website and cant share them.