White is great - in Australia it costs as much as MTN Hardcores and Ironlak, but it covers better than either. The pressure seems to be a bit less than Ironlak or MTN, try it out. There's a huge price diff between White and Black, and I can't really justify buying it for the matt finish since both cover about as good as each other, although the Black's colour range is about 3 times as big as the White's. Dunno bout Gold.
I don't really agree with not starting out with Montana, since starting out with shit paint can be frustrating. It might very quickly give you finger strength since you use more cans to cover the same area, but buy good paint if it's not too expensive. You get almost twice as much colour out of a good mid-priced can than one which is 2 or 3 dollars cheaper.