If you want to be an airline pilot, I'd suck it up and go to a regional. I see low time guys fall into the turbine corporate trap all the time - it might be a good job for a 1500 hour pilot, but time is of the essence, and most corporate jobs won't put time into your logbook very quickly. Plus, you're counting on an upgrade in a situation where the right seat time is dubious at best. I wouldn't be happy with that either.