2016 Pro 155 or 2016 T3 154

Both should be great machines, look at what dealer would treat you better.
If you are worried that the Axys Pro won't be rugged enough then consider the SKS. It has a front cooler, chain case, aluminum over structure and bogie wheels and can be ordered with a 2.6 track which I think is going to be awesome.
That said I ordered a Pro 155 with 2.6 track. Good luck!

I bet both will be great machines. My wife has a t3 174. The t3 package is way better than the regular xm. I have a pro with air loc boards that are set at 2 inches higher than stock. I know what a difference it makes to get the sled out of the snow and that is only half of what polaris did. The xm's tend to trench a little. I had a 154. The 3 inch 154 is going to go better but I am still betting it will trench a little. Their wide body and boards are a hinderance in deep snow. Polaris fixed the trouble spots on the new axys. I didn't see any stones they left unturned other than the rear bumper. I believe they have a stronger and way lighter chassis. They are by far the easiest to work on. 20 seconds and all the hood and plastic comes off. The only question is the motor and nobody knows as far as reliability. All the other brands are hoping it is unreliable because if it isn't they are so far ahead it isn't funny. I would like to ride both but I know which one I'll be riding. It is awesome that a few of my buddies are getting the t3 154. It will make for a fun year.

I feel they'll both be great sleds. If I was going to snowcheck I'd go Polaris, I'm sure the new track will be a solid step up and if I have a 4 year warranty I'd gamble on the motor. The Doo will forever be squirrely in my opinion and is not a confidence builder. I've become so confident on my Pro I feel I can thread any needle I choose. I hope the Axy's geometry feels similar (little bit of an unknown).

polaris. I have had both. just sold the 2014 summit x 800 to order the polaris sks. I loved the etec but loved the the way the rmk handled. I could never get used to the way the sled dipped and dived on the summit. just my 2 cents.