Vallejo is my primary go to paint at is chipset accurate and is a very high quality paint with a strong pigment which means that you don't need to use much to get the right depth.
I only use other brands when I have to and when I need colours that are not in the Vallejo range. The only exclusion to this is AK's Xtreme Metal range which beats Alclad hands down and won't melt your model! That and Vallejo's Metal colour range sits and co-exists side by side on my bench and gives me a huge tonal metal colour variety.
many other brands(mission, AK etc) use scale correctness formulae quoting light reflectability, which according to what a leading ophthalmic surgeon here in the UK says is total BS as the colours we see depend on the rods and cones in our eyes and differ from person to person as well as our subconscious lightning or darkening what we see in order to bring out detail.
Vallejo can always be modulated anyway by the depth of paint you apply although this takes some practice and thinning the paint a little.
I love how the Jeep has turned out with the Vallejo OD and the dry transfers directly on to that paint will look great. No varnishes needed!
James