Welcome. I'll second the snowjob. It will let you get both a clean boost and distorted booster/OD distortion. If you socket for the diodes you can swap until you get soemthign you like. Hell you can put the diodes on a switch and get 2 different clipping options and the clean boost.
Once you get that under your belt, I would say the Germaniun Giant. But, you'll need a Ge transistor and Ge diodes for it. One of my favorites, not just cause I worked on it's development with beaker and a few other guys here, too many names to list, it's really an awesome effect. It's one of my "always on" effects.