The Sartorialist is a huge source for groom style ideas. Here are some of my favorites:
Glenplaid suit and striped shirt combo. Loving the mix of patterns on the photo on the left.
Bow ties, vests and rolled up shirt…
I usually don’t care as much about black suit ensembles, but I love how sharp these two look:
These short ankle pants are not formal wedding attire per se, but they would look so cool for a casual summer wedding.
Gray slim fit suits and skinny ties. Love the simple lines of their pocket squares.