You’d be crazy not to pick the 145 from my perspective, if its offered. Everything they’re saying about the advantages of the 175 is true, and you’ll hold a line right out of IOE with ok commutabity in ORD on it, but nothing could possibly beat living in base. MIA has much of the best flying in the company, by far the best on the 145. It is very senior though, and you likely won’t be able to hold it until you’ve been here 9 mos, probably 4-6 of which will be spent commuting to reserve in ORD anyway.