Since you say it's just for looks I'd say go with an AS up front and a 4x4 block in the rear. Will put you at a 4x4 hight and not look goofy. That is unless you're going to go for a pre-runner look. In that case lift it. I wouldn't trade in a truck that isn't any older than yours.

 

I say keep your current truck and lift it.

 

You guys think down the road it would be easier to sell a 4x4 lifted the a 2wd. I guy it all depends.