Thanks to all for the opinions.
I've only 3 empty GPU slots at the moment. So I think Vega56 is quite good. I should to get experience in Red GPUs.
Vega doesnt play well with other cards right now.. Pretty much any action on any gpu in the system will cause hbcc to drop. The only way I was able to get hbcc stable was to remove Nvidia cards and run a max of 4 vega only. Im hoping my other 4 slots can be used for more gpus if Blockchain drivers get updated.