What's a good starter suspension system that can be upgraded later?

Hey Dragin Demon -
The only thing that bothers me is the title of this thread. Why? Because it sounds like you want to spend some money now, but not too much. And then you want to spend more money later to reach your ultimate goal.
So, one observation and one question:

• During your buildup you run the huge risk of running with some major suspension items that aren't designed to work together. This can be dangerous and you certainly will not be happy with a cobbled together system
• How much more is it going to cost to buy parts separately over a period of time rather than saving and buying a packaged kit that's proven to work?

As always, your money and your decision.
But I learned the hard way about double-spending during a build project.
Best of luck on whichever way you decide to go.