We already put a small deposit down with a certain vendor, but have decided to forgo using their services due to some gut feelings and some other issues. I know that we're the clients and shoudn't really feel bad about this, but I have a guilt complex when it comes to certain things and this is one of those times. Would it be rude if we sent an email as well as a letter via snail mail that's signed and dated and simply says that we've decided to go with someone else? Anything else we should say?