FI was looking up tuxes last night (it was really endearing because it was like 1am and he was looking up wedding stuff), and then came across something he really likes, and is totally his style. I love it too, I think it will look great. It's a suit though, not a tux, so I'm thinking the guys should just do regular suits then also. It would be kind of silly if the groom isn't wearing a formal tux and all the GM's are.
Originally, we were going to let them pick whatever style tux they like in black and white and have done with it. I guess we will just give the same stipulations for a suit then, does that sound right?
Here's what FI picked out: