Fair enough, but unless you present a reason for such a small cab (there are plenty),If you were looking for a cab - SMALL cab - and it was being powered by a 50W tube head - would you want a 2x10 or a 1x15? Why? And don't cheat say "both." Yeah, yeah, yeah. But lets pretend you can literally only bring one to this gig - mid-sized club with a PA.
it's difficult for some of us to resist suggesting bigger.
That said, I'm gonna suggest a 2x12.