Fly a Cessna if you intend to fly a high-wing like a Dash 8. Fly a Warrior if you want to work for Virgin or Jetstar because the low-wing characteristics are just like a jet. You can't get too much practice!
WTF? It doesn't f
ing matter.
I would choose the PA28 as it teaches you better fuel management and the need to better manage your energy on approach as you don't have barn door flaps to fix your f
k ups if your are a bit high or fast.