13 Years and I'm back! 2017 GT or 2018 GT?

I have had two mustangs, 89 GT and 97 Cobra. Then in 2005 I sold my soul and my mustang to the devil for a C5 Corvette. It has been a nice 13 years.

I have twin two year old boys that are getting to be the age where I would like them to enjoy a top down afternoon ride. I want a Mustang again for that backseat.

I have been looking in my market (Chicago area) and it seems like there are deep discounts on 2017 GT premiums ($5,000 below MSRP). I believe this is probably because they don't want to be stuck with a car they cannot sell because of the greatly improved 2018 GT (25 HP difference,digital dash, exhaust modes, magnetic shocks, etc.)

Do you think I will see deep discounts like this in the summer of 2018? or is this a right now incident because of the big 2018 changes? Or does this happen every year when dealers dump last years inventory?

TL;DR Would you buy a 2017 GT at a reduced price today or would you wait till next year when you could afford a 2018 GT?
 
I would wait, the '18 model is a big leap forward.

I have very dirty dreams about that new direct injection engine........ooooooooh.........with forced induction maybe later, extremely badass.

Seriously, the '17's are nice, but if you can wait till the '19 models come out you'll still get a great discount.