You make an excellent point that I completely neglected about CL, being that there are commercial CL options if SBCL doesn't scale up appropriately. I've heard

You make an excellent point that I completely neglected about CL, being that there are commercial CL options if SBCL doesn't scale up appropriately. I've heard nothing but good things regarding Lispworks and to a lesser degree Allegro (although, I think that just has to do with their weird pricing scheme).