depending on your face type if you went with a +0 rear or -1 on a regular face wheel it would net you a 122mm lip rear. I believe that is the max they run but I am checking into that to see if they go deeper
hahaha I PM'd Rick yesterday about this type of setup as well. I have a BBK so I am trying to get as low of a disk face but still gain the deep dish look.
Your tire range is completely valid and spot on! if you are going for pure looks i say get the 20's but if you want to maintain low weight performance stay with the 19's. I am going to go with 20's