Start asking questions, you will be surprised at the quality of the answers. We were at the same decision point and had SMB build our Sprinter, the problem now is that we now put priority on using it vs. all the other things that now have a way of waiting! Look at every SMB you can, read here, and start making the decisions that will get you what you want. Don't discount the waiting involved, at some point you will need to take a leap of faith and "lay your money down" and get in line if a new Sprinter is what you decide on.
“Flint” - 2016 SMB Sprinter 4x4 144" RB 150S w/ PH