Martin leads the team in walks and OBP. I would go: 1.Martin, 2.Buxton, 3.Larnach, 4.Jeffers, 5.Lee, etc. ... and then 9. Kriedler as a secondary leadoff guy.
I agree about Coors Field -- spectacular views. The Pirates' ballpark is very nice. It's hard to beat Fenway Park for the history, the quirky dimensions, the Green Monster, the Pesky Pole, etc.
Beat case starting rotation (which may never come to pass) of Lopez, Ryan, Taj, Abel, and Prielipp would be fun to watch ... if we could just catch the ball behind them.