you said last spring that the 174 isn't for you and you would be sticking to the 163.
Yes I like most am always scared of going bigger as I am not a hill climber, I am love deep pow and carving, last year I had a 154x and a 163 sp, I thought I would try the 163 and ride a few times but go back to my 154 and never ride the 163, after my first weekend on it, I did not want to go back and did not, did not ride my 154 until doing a video on it in the spring...
The same was last year with riding the pro to, i did not get to ride it in great snow while I had it so I thought I would stick to the 163 and 174 is overkill...did the same this year, have not put hardly any mile on the 163 T3 and don't want to...the 174 turns on a dime, is lighter than my previous 154 and 163.
The decision is always yours to make and which ever one you choose you will be happy with but I will always give my opinion and like any opinion it can change.
Ski-Doo sold equal amount of 163/174 t3's which is surprising but it is cool that more and more sledders are not just going of past experiences but thinking about the new technology and embracing it.