Gotta love forums for diversity of opinions!
This topic has been thrashed to death before on here and the same conclusions are usually drawn at the end.
Where the board is made is irrelevant, as most brands source boards from China.
Every country can produce crap and any growing sport attracts cowboys, so if ever 'buyer beware' had weight, it is right now in this sport.
The best advise around this topic, given many times on this forum is that 9/10 you are best buying a good second hand board from an established brand with a trading history and you will always be streets ahead of some shiny, shiny new thing from a brand you have only just heard of.
The other gem, dropped a few times is that 'the poor man ends up paying the most'.
Buying the cheapest often costs you more in the long run.
SUP is a long and rewarding journey if you take the right path. Strike up a relationship with a local dealer with a good reputation, who you feel comfortable with and he will save you bucket loads by reducing the number of board up-grades you need to keep a big smile on your face.