Here are a few of the options we looked at. I personally was a fan of the black shirt with the silver vest since we are going with silver as the color of the vests. I'm not sure if that color will look good on everyone, so it comes down to being Jeff's fiance's call.
I really liked this look, but again... not sure if it would look as good on us.
Here are some random shots of Jeff's brother-in-law, Ahmed, and myself assisting Jeff with the process.