What amp and cab is this new rig replacing?
A 212 probably wouldn't carry enough outdoors. IMO outdoor gigs and casinos need FOH, so a 112 would do. For bars and clubs I'd use either my BF Super Compact or BB2.
I currently gig a Genz Benz Shuttle 6.2 with a markbass 2x10 and a fender bassman 1x15. Those were convenient deals I picked up to replace an EBS 4x10 that was just way too much to lug around lol. I just picked up [last week] the DG Microtubes 900 V2 and want to go to a single manageable cab or 2 smaller cabs. Thats why I was leaning toward a 2x12 thinking it was the compromise. I also play a variety of genres so I'm trying to work out something pretty universal.