Is leather important to you? I'm of the opinion that modern textiles are the way to go. Much lighter and more versatile. I have textile gear that can be light and breathable and offer some protection while keeping the bugs and grit off (great for commuting and not showing up looking like you commuted on a bike); or with liners can be waterproof and warm and work well!
My recipe is a textile jacket, and a second thin rain/wind jacket. It's a liner, but it has it's own zipper and can be worn as it's own jacket. That's beneficial because it's easier than inserting/removing the liner to just put the liner on, zip it up, then put the jacket on. Then I have overpants that go, as the name suggests, over my pants. Good boots, and gloves for the occasion (heavy lined leather ones for cold and rainy weather, to light mesh ones for the summer. Gel palms are really nice for comfort). Personally I wear a full face helmet and a good scarf under that makes a world of difference in the winter.