No sulfur smell yet, and the burnt electrical smell hasn't come back, either.
Checked again when I got home last night; with everything on (wipers on high, stereo cranked, lights on, 4-ways on, and my girlfriend opening and closing the windows/sunroof and moving the power seat back and forth) , I'm at 14.3 at idle. As soon as any throttle is given it's between 14.45 and 14.52. If everything is not on, it sits right around 14.5 at idle and at 3500rpm.
I'm riding around with a spare alternator in the toolbox in the trunk right now as I didn't have time to install it last night. The last 250km I drove last night and today were perfectly normal, though. Car felt the same as always.
I did have a sporadic issue with the car last winter when it was really cold outside, like colder than -10 C. All of the warning lights would come on and basically the cluster would act like the key was in position 2 and not running, even though I was driving down the road perfectly normally. That went away when I redid the battery terminals months ago, so I had assumed that was what was causing that too, but maybe it's been the alternator all along.
The weekend is coming, so I'll get it swapped hopefully tonight or tomorrow.