Great tune and you are defiantly in Steely Dan's neighborhood.
Are the horns synth or real? I get the feeling they are synth although they are very realistic.
I agree with the mix comments Walt Collins made he is on point I think.
You are very close on this and you have done a good job so far bringing the style into focus.
The only thing I would add is that a few nice sax licks in the vocal gaps between verses etc.