For color accuracy, you won't beat Model Master. The downfall being (at least for me, in my experience, yours may differ) is that I've never found MM to airbrush nicely nor is it a very 'tough' paint in terms of resilliance for masking. Vallejo RLM colors are not the greatest match (I recently went through this with their RLM 76, wound up mixing my own) but once it is dry, Vallejo's Model Air is very tough stuff, stands up to masking and tape lifting like a dream. Hence, now I only shoot Vallejo. You just have to get around the color accuracy, say 'ok, it's close enough' or get comfortable mixing your own color from their paints.
That's my two cents, I hope it helps you, and I don't think you'll be disappointed with the Vallejo paints you recieve as far as tenacity. They shoot through an airbrush like a dream and handle the masking tapes nicely. Just be prepared to look at it and say 'that doesn't look like 76'.