If you're doing any landscapes, or shooting things at a distance, you will most likely need a spot meter. if you're able to measure the light falling directly on your subject then incident is OK.
I have a Sekonic L-358 incident meter which works great and has served me well as an incident and flash meter but now I'm shooting medium format and my current favourite thing to shoot is landscapes, it's hard to meter accurately.
I've got my eye on a 758DR. I'll sell the 358 on ebay and fork out the difference for the 758.