As a former MSF RiderCoach:
If you are burning up the back roads, get a suit. Two piece that connects all the way around or a one piece that is as comfortable as you can get. They should comfortable in the riding position you commonly ride in, and less so walking around.
As always, your choice.
I have two, two piece leather suits, plus a CorTech jacket w/ liner for more comfortable riding or commuting. One of the suits I would use for touring and long trips, perf'd leather. The other I would use for more aggressive day riding where I was either close to home, or had a base to come back to. But really, it just depended on how aggressive I wanted to be that day.
I eventually got a back protector and knee/shin protectors (both ICON Field Armor) that I would wear under my jeans. You couldn't notice they were there and they're cheap. An invaluable investment in protecting your legs and vitals that you can wear year round.
As you probably know, it is less about preparing for the ride, than it is about preparing for the fall.