If your just starting out I would get the 05 ego, purely because it will never let you down and will intruduce you to the basics of marker maintainence, I currently shoot an invert mini and it is without doubt the nicest marker I have ever used, it's not high maintainence by any means but the ego5 is the ideal marker in many respects, especially for someone new to the game.
edit: DM's more reliable than mini's.... dont make me laugh.