I own several, most notably a Pentax Digital Spot, modified by Zone VI. I also own two Soligor Digital Spot meters, one modified by Zone VI. I also have a Sekonic L508, and a Gossen Luna Pro SBC.
The Sekonic is a fine general purpose meter for spot, reflected, incident, and flash purposes.
Of the Gossens for general use, I recommend the Luna Pro SBC. It uses standard 9v batteries, and its Silicon Blue Cell is superior to the Cds cell it replaced on the older Luna Pro meters. The older Luna Pro's require some type of substitute for the old PX13 and 625 mercury cells. You can fit silver cells in the meters, but you need to adjust the meter for the increased voltage. There are some folks out there who can modify the Luna Pros for use of silver oxide cells, but that's a bit of an outlay.
I use the spot meters most of all when shooting medium and large format. All three of the spot meters are within 1/3 EV of each other. Close enough. The Zone VI modifications aren't of as much use to me, since I don't shoot a lot of B&W film.