For USPSA limited, 40 cal will allow you to shoot major power factor, and is what you will see most limited shooters running.
From my time in the sport, most 2011 shooters use an "Edge" type setup, a long dust cover and bull barrel, the added weight helps to manage the recoil.
With the Eagle you can get either a bull or bushing barrel I believe. The Bushing barrel would allow you to also shoot IDPA if you ever wanted to.
I would suggest seeking out a couple of the local guys in your area shooting 2011s and ask them about their guns, what they like and dislike about them. If they are anything like the guys here, they'll allow you to handle/fondle them at the safe table to get a feel for them.