Building suspension, need some solid advice.

I'm having a really hard time deciding what i want to do. It's between building my suspension up one piece at a time or waiting to buy full long travel. I know for sure that i want to build long travel but i don't want to be sitting on stock suspension until i build up enough money to get it all at once. But, the problem is i don't want to buy oem parts and end up having to swap them for long travel parts. For example, buying the oem king coilovers and then later on needing to replace them because they aren't allowing the travel i want. Just looking for some advice.