Rear change for BBP - What would you do?

Another option: I could do the disk brake change in the front which will put me on a 4.5" pattern but then keep the 7.25 in the back but just run a 5 on 4" out back. There are serveral wheels that offer both 5x4.5 and 5x4 that I could choose from...... Would screw my spare stradety up though........