I’d go all in one, which is Exposure really. Plugs and cables introduce huge potential for points of failure.
If I was buying now, I’d get a Race or Toro and a couple of spare mounts for other bikes.
But I’ve got a Lumenator from mtb batteries/mark/smudge which is a lovely light to ride by, even more so when mounted to a CandBseen clamp. It’s given up a few times, due to electrical contact point issues in the plugs or cables, getting less frequent the more care I take in handling them, plugging them in, how I have the cables wrapped round stems, bars, frames.
But if when there’s a problem, it’s still cheaper to send them to smudge and get them repaired than splash £200 on a new light,