As far as lighting goes I like the second shot more than the other two but they're all pretty good.
The first one the hand looks a little over but the watch came out nicer.
I'm surprised you're using just the modeling light, seems pretty risky as far as blur goes.
I'd probably use a softbox with a grid in place of a beauty dish for a similar effect also, but that's just what I'm used to.
I've never seen anyone use a grid on a beauty dish, I'd definitely like to try that out and those came out good.