Right on... Well odds are that you won't get a choice between the Dash and the jet. Historically people with higher time get the Dash. In the past people with lower times didn't do quite as well in the program.
Although, you will see a few higher time CFIs in a dash class, it's normally made up of 135 guys and folks with some turbine 135 experience.
When I went through they took 15 folks for the Dash (pre-selected for whatever reason) and the remaining 50 or so got to fill out "dream sheets" for the CRJ/ERJ and were awarded whatever they got while in indoc.
Now, back then, there was a MAJOR captain shortage on the Dash and my whole class was awarded DHC-8 Captain, IN GROUND SCHOOL.... The class of 15 ended up a class of 9 and to this day I'm one of 5 that remain for whatever reason. Then they did similar the following month and in the late spring '04. The most junior captain on the Dash right now was hired (I believe) in April '04.
Things have changed a little. Now there's a bunch of san juaners who are beginning to meet the upgrade minimums, and about 10-15 FO's hired in '04 who have their bid in for Captain. Probably, most of these folks will upgrade within the year, and others may go over to the jet, so with all that considered, 2-2.5 years seems about right.....
The most recent D8 class that started last month, rumor has it, were all awarded GJT FO... This is because a hand full of GJT fo's bid over to PHX which is extremely short. I don't know where this leaves Denver, as we are still fairly short on both Captains and FOs. I'd say it's likely a newhire D8 FO will get GJT or DEN. Not a bad commute... Expect to be able to hold PHX FO within a year. PHX remains very senior for captains though... I still can't even touch it if I wanted. (which I don't)
As for the 1900, you don't have to worry. If you were getting that, your ground school would be in Wichita. I think there's a good chance you'll get the Dash. If you do, you'll love it. We're a tight knit bunch and seem to keep out of the BS that goes on in Jetworld. The Dash is a damn good machine and like I said before we go into some pretty wicked places, like Aspen. We get to eat good Skywest snacks out of Denver too...
Good luck, PM me if you have any specific questions...