Wow what a job you did on the ZZR, friggin amazing transformation, she really is a beauty. What an asset your going to be
As for the M, as far as customising goes you have picked one of the best mid range cruisers to do it too. The fishtail version really does lend itself to modification so well, much better than the newer model. You will find an abundance of aftermarket kit on the net for these little beauties.
A good place to start looking for inspiration is Blue Collar Bobbers LINK
Not the cheapest place to buy from but great for inspiration.