Originally Posted by highfarfast

Based on your post it sounds like you’re coming with some time that qualifies for upgrade which means you’re likely not a cadet which leads me to believe you should NOT be fairly senior in your class since cadets pick first.

In any case, you don’t really provide enough details to give great advice. Ultimately, pick whatever aircraft that has a base to where you don’t have to commute. If you MUST commute, get the 175 if you can due to the shortest reserve for FO. I don’t know about ORD but in my base (DFW) CA 145 lineholders are significantly junior to CA 175 lineholds. If it’s the same in the base you want to work at, upgrade to the 145.

You don’t want to commute to reserve.