Bows, you should go for it. First, the plum tie bar shirt is sick.
Waistcoats are actually easy to wear. (I'm wearing one today.
) As long as you don't style yourself like a J.Crew employee (you know what I mean) I think they look good and they're an easy way to add a layer/texture. For anyone interested, defpoetry has a Geller sample with a deep scoop up in B&S in size 48. I think he's asking $200.
Edit: I realized just after typing this that my waistcoat is from
J.Crew. Haha. It's very un-J.Crew-like though. It's a blend of wool, linen, and metallic thread.