Well, first thing I see is that you want to go to 6" WITHOUT a long arm kit...bad idea.
Now you have to ask yourself these questions...
How often do I offroad?
What types of terrain do I offroad in?
How hard am I going to abuse it?
Am I getting the lift mainly for looks?
Do I really have a need for a 6" lift?
Do I have the budget for a 6 inch lift? (going that high involves SYE, driveshaft, bigger tires, gearing, yadda, yadda....)
Answer those questions, and other people could help you a little better.