What set up for rear leaf springs do you think would be the best? What about the original 4 leafs?

 

I replaced my old ones with new standard eye 4 leaf springs. My old ones were sagging so bad, that when I got the new ones on, it raised my rear back to factory specs. see in my sig pic how it looks after I replaced them. Now the mid eyes and reverse eyes will make the rear either higher of lower than the standards. The 4 1/2 and 5 leaf springs would be too stiff I would think, unless you are going to be pouring some serious horsepower back there.