I'm going to get a 4" lift sometime soon hopefully. I was just wondering if it would be better to have a higher or lower spring rate on my blazer which would be used mostly for mud. I'm thinking that I probably won't need very much articulation. I also plan to run 35" tires. Mostly I am considering Tuff Country (low spring rate) or Superlift (high spring rate). Please let me know what you think.