Poll HN: Incorporate in US, Canada or Netherlands?

I am working on a startup from South Africa and am considering a legal entity in either US, Canada or Netherlands. I plan to seek professional tax and legal advice but I wanted to know your thoughts, advice, particularly re: EUR as a billing currency vs USD.

Server costs are USD and EUR (OVH.ca, Hetzner.de). Billing would be SAAS, on a yearly or 6-monthly basis to amortize credit card transaction costs. My main concern is to avoid currency risk by billing in the same currency as the country of incorporation.

The majority of my market are in North America and Europe.

Where would you incorporate?

If you are currently based in the US, would you consider paying for SAAS in EUR?