Jason,

Since I cannot give you an expert answer to that question I recommend you to take a look at this article where several investment proposals are mentioned. I hope that could help you find some solutions for your business plan.

Good luck and congratulations on your startup!

While you don't need to include the valuation in an initial pitch to a serious angel investor, it is critical that you have a pretty good idea of what the 'market' valuation is for a business of your type. If possible, let them make the first suggestion of a valuation, because one of the most common reasons that deals don't get done is an entrepreneur aiming way too high, and the angel simply walking away.

The sad but true fact is that in 99% of cases it is a pure buyers' market, and they will get as much of your equity as they ask for...simply because you probably don't have any other options. (And remember, if you're asking for $600K for 1/3 of your company, that means you're telling prospective investors that you believe that you have already created $1.2 million of value in what you've done so far. If that's not the case, you may need to re-think your plan...)