Angell: (assuming of course your cash flow projections are reasonable).
I don't think there really is a way to make reasonable cash flow projections 5, 10, 15 years into the future. I don't think it can be done even 2 years into the future for tech companies.
You're kinda stuck with big caps in boring markets: WAG, JNJ, MMM, barf barf barf. A big risky buy would be MRK. And I don't mean to bring up a sore point, but FNM had some of the steadiest cash flow figures around.
Sure this is what Buffett buys, but it is so damn uninteresting. There really is no way to do a DCF that you can have any assurance in for GOOG for example. I did an evaluation with optimistic cash flow growth figures and came up with a price of $2,500+ per share. Then I did another evaluation with pessimistic figures and came up with $200 per share. Meanwhile GOOG has made millions of people tons of money and I'm still tinkering with my spreadsheet. Forget that!