But, I already found that when the wife asks me to run to the grocery store for a few things (which I'm *much* happier to do now!), it fills up quickly. So I tried out some saddle bags and decided on the Nelson-Rigg CL950's. I also looked at the Classic Accessories MotoGear 73707, but found those a little too boxy in profile compared to the lines of the 150. Though the NR's were more expensive, they're very well constructed. They also come with shoulder straps, good in theory, but you're also carrying with them the really wide velcro strips, which probably just looks odd.
Although I haven't actually ridden with the side bags yet, one issue I've found already is that they make putting the scoot on the center stand much more difficult, as they block where I normally grab onto the body to rock it backwards. Not impossible, but not graceful either. The wide velcro tabs go under the seat (which never seems to close properly anyway), and the smaller clips go above the tail light and above the wheel to keep the bags on the frame. They are wide, and hang down at a bit of an angle even when empty, but they come with a good thick heat shield that looks like it will also keep the side panels from getting scratched. The bag straighteners have a really good fit, too. Once I make a real grocery run, I'll be sure to update the post. Meanwhile, I did take them off ahead of my next ride, as there's really no need for them unless I'm actually carrying stuff.
Didn't realise I should post the pics in reverse until I previewed, and I'm too lazy to change them now – gonna go wash my baby! (PS, the Apple sticker is on there because selling my stock was how I bought it.

Hope this helps any other riders make some accessory decisions!