Used barefaced?
Not sure you'll find anything lighter.
I went through this process and ended up with a Super Twin (wheels!!!) and a One10. Funnily enough the ST is often easier to deal with than the One10 when I want to do 1 trip from the car just because of the wheels.
I can manage lifting it easily enough in and out of the car - but I have an estate with a flat boot area so there isn't a lip to get it over. In an ideal world the cab would have a couple of metal runners on the back to make that even easier, but that would put the weight up a bit.
I almost always take the Super Twin, then add a Sandberg Super Light bass, my Ashdown RM800Evo2 and a compressor pedal.
The rig is light enough for 1 trip, and I'm amused that my folder of sheet music weighs more than the Ashdown. Next step will be a big cheap tablet and scanning it all on.