If I was buying all-new right now, it would be a supernova combined with something battery powered like the newer cygolights on the handlebars as a highbeam.

I really like my Supernova and prefer it to the B&Ms i've tried since.

The supernova tail light is far from perfect, but it definitely works well enough for me (not including the weak stand light). I drove up behind it and it's hard to miss. Always have a superflash too

Cons to the Supernova/bonuses to a 2 light set-up:

The asymmetrical e3 does too good a of a job with cut-off. It just doesn't stand out unless you are seeing the main beam.

The battery powered light on the handlebar is redundant (in a good way) and 2 lights are more eye catching too, even if running on super low setting just to be seen.

Battery powered lights are relatively inexpensive these days.

The combo allows a true high and low beam so you can dim/brighten as necessary without completely covering/physically adjusting your light up. Some of these lights without a cut off probably are too bright to be running safely on public streets. I have actually heard of some altercations happening over them (among cyclists) locally this past winter.

The stand lights are still pathetic on all of them. the asymmetrical's might as well not be on. A battery light reduces/eliminates this issue this.

I'm running my minewt X2 as the battery light part of the combo and they work very well together. Will be upgrading to a cygolight or similar when it expires.