You are not likely to even find a single stage compressor big enough for your needs so that's probably not even a consideration but two stage is by far the better choice anyway. You are definitely looking at industrial duty needs and since this is to be for a commercial shop then don't even think of trying to get by with a Chinese import and those things are out there in the size range you are going to be looking at. Personally I recommend a Quincy, USA made and IMO the best compressor on the market and one of the oldest names in the business. This would be the minimum from your description of your needs.
This would be better,
if you are going to have need of more air than that, maybe 4 1" drive impact wrenches going at the exact same time and maybe filling a tire also then I would suggest looking at a screw type compressor.
I am assuming you are going to have three phase power, right?