Skykid
Take the earliest class date you can. If it's for the brasilia DO NOT WAIT FOR THE JET. Seniority is extremely important for determining your future earnings and living situation. Had I been in the class right before mine I would have been based at home as a CRJ CA over a year ago. Instead I commuted to the west coast as a Bro CA for a year and a half, and am now commuting to ORD as a CRJ CA while I wait for my transfer to go through.
If you actually get the choice between bro or jet for the same class date then you'll have to decide if you want to be a lineholder on the west coast in the bro or sit reserve on the jet in ORD/MSP/IAH/DEN. If you want to stay in PDX then it's a no brainer. Bro all the way. If you want the chance to get pistol whipped in Mexico then it's a no brainer. IAH CRJ you go.