The difficulty in choosing Horizon for the new guy is that if you go to the Q400 you will be flying an aircraft that is being phased out of the inventory, meaning you may be looking at short term future domicile and aircraft change and in the interim having to take the leavings as more and more of the longer routes go to the jet.
But if you go to the jet, every Q400 they do retire will shove about seven more FOs ahead of you in the bidding seniority for the lines available.
If the transition goes smoothly the extra extra e-jet flying that comes with the new aircraft ought to make that somewhat of a wash, but little of the process has gone all that smoothly thus far, IMHO anyway.
And the outsourcing of Horizon flying to Skywest is worrisome to say the least.