Tux Ideas

Hi!! My FH and I picked out the tuxes last weekend and have a few decisions to make before finalizing/making deposit. We are good on colors as I took my swatch (plum) along, but still undecided on a few things. I'm such a visual person so trying to picture what everyone will look like in photos is tough.

FH is in a dark grey tux, plum striped vest, plum vine tie, white shirt. The best man/fathers/usher (which is a brother in law) are in a lighter grey with matching grey vest. Best man striped plum tie and fathers/brother-in-law plain plum tie.
Should all guys shoes match?

My nephews, 9 and 14 are also ushers and will have lighter grey pants, white shirt, striped plum bow tie and plum suspenders.
Do they need a jacket?

What are your thoughts? I'm getting mixed reviews from family. I'm sure it's all a personal choice and as my sister always says, its whatever you want. I'm trying not to think about it too much, but want it all to look nice for photos.