Hi, I would like your opinion on this Mining Rig.
First some premises that you might consider before expressing your view: 1) i've free electricity 2) i've choosen this GPU also because i need the rig for bruteforcing.

Well of course these are the basic components i'm going to buy:
- AsRock H81 Pro BTC
- Intel Celeron G1840 Dual Core
- Hyper X Fury DDR3 8Gb
- PCI-E 1x to 16x Powered USB 3.0 Extender Riser Adapter Card
- Kingston SSD 60Gb
- Power Supply 1300W (do you think it's enough for the following 6x GPU ?)

For what concerning the GPUs (remember that i need them also for bruteforcing) even if they are a little bit expensive i was thinking to:
- 6x NVIDIA GTX 1080 Ti
or
- 6x NVIDIA GTX 1080/1070
Whit these setup, doing some nicehash's estimation the ROI is not more than 200 days.
What do you think about it ? Are there other GPU might works better for both multicoin mining and occasionally bruteforcing ?