I'm very sorry, we consciously don't explicitly recommend specific hardware setups, as that puts us in the legal grey area of being responsible for your investment (and the investment of others reading this).
If you want to get an idea of how well certain hardware performs, we have created the benchmark test
specifically for this purpose. The benchmark test lists all the hardware components that influence performance (GPU, CPU, operating system and storage medium), so it's very easy to see what works well and what doesn't. I noticed the NVS810 is on there too, btw.
AMD R7 and R9 series cards can do 5 outputs + 1 UI output by using MST hubs. 6 outputs in total is currently the maximum that we can officially support, as it's the maximum that GPU manufacturers officially offer on a single card.