IMHO, there have been many models posted in this site that have been brush painted that look very good. My feeling that successful finishes are acheived by talent, because the techniques are just common sense.....proper brushes, high quality paints, properly mixed and thinned, etc.
I think that there is no substitute for airbrush finishes, especially when you consider the value of effects such as preshading, weathering and accenting. Most modellers who advance in the hobby eventually get going with the airbrush. You get a better paint job, period.
Just my
Steve