LMFAO Your winter is my summer!

Our average temps for July are around 7.5C up here in this particular area of Nunavut (Much like Australia, the temps can vary wildly depending on where you live).

Do you think you will go mirrorless when you upgrade cameras? Personally I don't like the form factor of a lot of mirrorless cameras. They all feel like my grandmas crappy Kodak she kept in her purse.

Edit: Missed the paragraph where you mentioned your upgrade. Derp! I agree with other commenters, go full frame if you can. I have the d750 and full frame is so nice to have. Sadly, since you probably only own FX lenses (crop sensor lenses) you will have to buy new glass to fully utilize that new sensor. So, if that is a factor for you, I would actually suggest sticking with the crop sensor d7500