MM enamels are are really disappearing? Oh my, talk about the end of an era.
Ernie, I can tell you already have some degree of trepidation in considering a possible switch to acrylics, and that, I think, is a healthy thing.
I tend to agree with most of lasdjn's comments above, except that I don't care for or use Vallejo primer anymore.
If you use the relatively new Vallejo airbrush flow improver as mentioned above, you should have little or no dry-tip issues.
A random thought is yes, as mentioned, Model Air takes a while to cure (it has a funny, rubbery feel that may bother you. My tip is ignore it, a clear coat of your choice and it's gone). And back to the random thought, enamels take a while to cure anyway. The Model Air will certainly be handleable much sooner.
Vallejo have been my primary paint since 2013. If you ever want to discuss this further, we surely can, Ernie.