I think I personally would choose a model 94 but did not mention it because he was asking about semi-autos. I would also have a Williams or Redfield receiver sight with the standard front one.
Model 94s are so easy to carry and in a fight you can shoot one then load one from loose cartridges in your pockets etc. That way you can always keep a full mag ready.
A model 92 in either .44 or .357 mag might be an even better choice.
OP wanted something cheap, reasonable power and semi-auto. You’re right, the Mod 92, 94 does all but the semi-auto thing.