Interestingly enough, I ordered a M9 5 months ago, had it built and it came through with the M95 engine.
Personally, I don't like the sloped hood but I do like the corner post exhaust (like our 105S). My prime motive for getting the old style was the deleting of the square hood.
I would have preferred the loader on the 105 (self leveling), but the 1215 loader is plenty strong. I haven't found the end of the loader yet. It handles ton pallets on the (Kubota) forks no problem and 2 rounds at a time. That's good enough for me.
I've no problem with the old style climate control, actually, I prefer (no) air outlets in the dash area, especially at knee height. The dash is a little to futuristic for me. Farmers like old style interiors, at least I do. The higher mounted lights are nice but I just added 2 extra forward facing halogens on the M9 and most often I don't use the grill mounted lights anyway...cornering lights, what for?? Cornering lights sound like an ad for a 1965 Lincoln Town Car. Your cab mounted lights should be angled out for turning in the field at night, hence, 2 forward and 2 angled outboard. The pantograph wiper is an added plus, The old style Kubota cowl mounted wiper is too low to be of much use. I would have preferred a roof mounted wiper, straight arm though. All in all, the old style M9 is fine for this farmer, besides I have the 105 too.