AW touch-up paint? Bimmertools AutoSharp?

[RedRockin]

It is only a matter of time until something nicks the nose paint (gravel kicking up from a vehicle in front, etc.). Living in Az, with such horrendously low-budget repavings, the highways are all chipping/flaking (even some lengths where ADOT has posted sings - on a 75 mph highway - that read "Rough Road"!!! ), these little nicks have happened to every car I've had. For previous vehicles I have purchased touch-up pens from dealers. What are people using for such little touch-ups? Dealer pens? Anyone try the Bimmertools AutoSharp touch Up Paint Pen: AutoSharp Touch Up Paint Pen ?? Anything better? Does the Alpine White make a difference? Some paints, and some colors, seem to match better than others. Generics usually don't match/blend so well. Don't need it yet (knock on wood) but past experience tells me I will - eventually.
T.I.A.