Junior RJ FO in PDX is coming up on three years. He's senior to nearly all of the EMB FOs in PDX right now.
My guess is you're looking at 2-3 years before you could transfer in. 56 pilots are on the standing bid list for PDX RJ FO, with 20 of them having it as their first choice. The base only has around 25 crews total.
Take the Brasilia if you want to be on the west coast. Especially, if this new pay package passes (vote closes in 3 days).