A good article by Duncan Epping with some advice for choosing your hardware to test VSAN on.
Duncan says:
“Over the past couple of weeks I have been watching the VMware VSAN Community Forum with close interest and also twitter. One thing that struck me was the type of hardware people used for to test VSAN on. In many cases this is the type of hardware one would use at home, for their desktop. Now I can see why that happens, I mean something new / shiny and cool is released and everyone wants to play around with it, but not everyone has the budget to buy the right components…”
The entire  article is worth reading and it has provoked some good discussion in the comments area as well.
Read it here:
https://www.yellow-bricks.com/2013/10/09/designing-hardware-virtual-san/