MarkH
Line Up and Wait
I have not flown any of the specific aircraft under consideration. I'm finishing up my instrument rating in a 172S with a G5 HSI and GTN650 and have flown 172N models in the past. That particular flight school only has the G1000 172, so in all likelihood I'll be moving on for my commercial.
Where do you fly out of in MA? I got my private at KPYM.
If you have more than 10 hours in the 172S (and it has an autopilot), then you have met the TTA requirements.
If I were you,I would focus on flying everything I can. You just need hours, I would start with a complex endorsement since they are available, then I would try to find a cheap tailwheel like a Champ, Vagabond or a Chief, and get a tailwheel endorsement and fly the tailwheel as much as possible. Possibly consider getting a glider rating.
When I hit 250 hours, I would then train in a 172, since there are multiple 172s available and one going down for maintenance would not force me to get used to another plane for my checkride.