"We don't need the money to be honest"
Hmmm, so why an angel, why the money. Look at bootstrapping is it a 5yr exit, 1yr exit or just short term glory? Most investors typically ask "If you are so good, why do you need the money?"
IMHO go for the short term loss and long term gain and stay private, unless your business plan isn't scalable of course and you want their money until the next good idea ;)
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