Revenue is typically always preferred by investors in general (investors, please chime in with your thoughts)
, in today's world. It is rare to be a company to get a lot of $ in pre rev. We read about it in magazines, but they are really one in a million.
If you need initial funding and you cannot afford to, or have run out of your own money to invest, go with a Friends & Family Round. This is also why crowdfunding has become such a hot resource for pre-rev companies.
Love to hear the thoughts of others.