I know you didn't suggest you were going to buy the new gen bike but I would NOT do that, personally.
Bear with me....
The Used Test article in the Aug Motorcylce magazine was on the Honda VFR. Like the GS, very tried, very tested, very popular in its day, many similarities. The intital model that got VVT (VTEC) was a disaster. I know it was some 16 years ago now but if anyone was ever expected to get things right straight off the bat, Honda was it. They didn't. They did, however, subsequently fix the problem but not for almost 4 years in 2006!!
As for the used buy..... TFT/analogue....... hmmmm, try both would be my advice and make up your own mind.
I live in a sunny country so one ride on an analogue machine in the sun made me go from totally anti TFT to totally pro. Ironically, if I was going too use my bike to tour Morocco, I'd have gone for the analogue.
On the positive side for the TFT, if you don't get on with the NAV6 (as I didn't) then you won't miss all those parameters on page 2 of the NAV because 90% of them are on the TFT and you can use whatever NAV better suits you.
As for waiting,.... you may time it just right, or you may find that there are no "most popular" TE's left or that you don't get the colour you want. Bird in the hand and all that. But then never look back and don't look at how much other people paid.