A search through the archives will show a few good threads on spotmeters.
The comparatively new Sekonic L-558 looks very good. I have the ciné model of its predecessor, the L-508, and the only disadvantage of that is the lack of a readout in the viewfinder. The L-558 remedies that with a good viewfinder display. I don't think that the L-558 can be used with the Booster II, as the L-508 can, but that might not be important to you.
I think that the only drawback of the combined models is that there is the possibility of taking what you think is an incident reading when you have it switched to spot, or vice versa. The puzzling behaviour of the meter alerts ditzy airheads like me to this error. Well, most of the time anyway.