Dot-org is mostly related to not for profit organizations or large organizations who are not really involved in any kind of business.
Well if your purpose is do business IMO going for a dot-org won't be a good move. The general tendency regarding dot-org is
as mentioned above and this may have a negative effect on your
website hosting.
Majority of people are not so computer savvy and they assume that most of the
website hostings end with the extension dot-com.