Equus belts are fantastic, and I own three of them myself. But I feel the thick bridle leather they use is a bit too rustic for suits. I pair their belts with jeans, odd trousers, and the occasional heavy winter suit.
Would also recommend RLPL belts. Their made in Italy belts are some of the best I've owned. Not sure who makes them. Added plus is that they're offered in colors that are ordinarily hard to find in belts: light tans and mochas, etc. These are the belts I reach for when I need to approximate the hue on my lighter toned shoes.