Leather is out since you will likely run into rain. However, it's still a good choice.
Textiles could be a good choice. Could be because if you choose wrong fabric and go down it is not a pleasent experience picking out melted polyester out of your tissues. With that said, serious LDR choose Aerostich products. But they can be a little hot when stuck in traffic. for other materials the thicker the fabric (denier) the stiffer it is. Reasearch your choices by web surfing textile jackets, lots of information!
Next up is layering and many other have written about this subject. With textile's being wethertite or rain resistant you won't need to pack raingear. I have, do and never use the stuff. It's getting trown on the rest of the heap in the corner of the garage. A good termal pull over will keep you warmer than just the zip out liner(s).
Add the fact you'll most likely find armor that's a good thing, just another layer.
Color, choose something that stands out. Around here there are many senior people driving around, like me, I might see you and I might not. That's why so many use the modulators.
Buying, see what Hal has and price shop. Let Hal know (or who you choose to buy from). Some institutions have price matching plus another 10%.
Finally, I bought a Tour Master, Transistion II, Yellow. Here in the south, Arkansas, it is comforatble in warm (when I have the liner out) and hot in below freezing riding 70mph (with liner and fleece pull over). It's dry. And I stick out like "Big Bird" as many have commented on this fact.
Freedom Rings,
Bobalou