I've got Riders Insurance. I just carry comprehensive and liability for around $120/yr.
I did have Progressive until they got greedy and wanted too much money.
I had a KLR 650 through them for around $110/yr and when I sold the KLR and got the Versys it went up to $260/yr I questioned them a couple times, they told me that's what it is for a "sport" bike. I said the Versys is not a "sport" bike and they should recheck their quote. They wouldn't do it so I moved on.
Shame, I liked Progressive until then.
The reason for not "investing" in collision insurance, if I have an accident and it's my fault, I prefer to pay for it AFTER it happens, not BEFORE it happens.