I can get 40.5W just fine in Denver on a 2.3m dish, although I'm planning on moving my orthomode circular feed to my 3m at some point. You do need a feed that can do circular polarization for this bird. There are only a handful of such satellites available in North America, because linear polarization is dominant on C-band here.
The classic ways to get C-band circular are a orthomode circular feed (about $500 a pop) or a Chaparral Wideband Corotor with a dielectric insert. The orthomode has very low losses while the Chaparral can be configured to get both linear and circular polarization by adjusting the rotor at the receiver, and receive Ku to boot. The ortho needs two C-band LNBs and the Chap needs a C and a Ku LNB. Recently, integrated C-band LNBFs have appeared with a removable dielectric insert. They are far less expensive, but you have to manually insert/remove the dielectric to switch between circular/linear. I expect the losses are inherently higher on this type of design.
