3'' to 6'' Lift help...

Sorry if this has been asked, I search and couldent really find a answer.

I just recently put 2.5 Fox Coil overs on my truck(3'' lift). I love it, but I see trucks with 6'' and well I might want that too. What are my options of going from what I have now to a 6'' using my currenty coil overs?

Do I buy the 6' kit with the DB and coil spacers like this link below?
http://www.roughcountry.com/toyota-suspension-lift-kit-747-20.html

Or is more complicated then that and im missing something?

Mostly a On Road truck, Wont do much Tough off roading.

 

Consider RCD 4-5"drop bracket kit? I love mine and fixing to put it on my 12 model now. Best of both worlds IMO.

 

Ill have to look into that. Thanks!