All of the Regionals out there are short for various reasons, but if you're worried about your flight time, go to Piedmont. It pays as well as any airline to start and you can build 121 time or wait for them to merge with PSA in about 2010. Whatever your motive, its a job, and they'll take you at whatever your flight time. There is a written assessment and a cake sim ride. Once you've passed the test and don't crash the sim, the rest is fluff. They'll take 350TT and 25-50 mt. (Reguardless of what school you went to)
It's not the best regional, it's not even the best Dash-8 operator. But it pays ok, you'll get as much flight time as you could want, and with the possible exceptions of UPS and Fed Ex, no airline is a sure thing.