Is it? Since I don't have much Guard stuff (I play all my games with my friend's Mordians), and getting the Guard stuff will be mighty expensive for me ATM, I was considering maybe starting anew. The only army that I'd want to play that I would assume would cost less than the Guard are the Sisters of Battle. Are they expensive?

If I did get an army, whats the best way to play them? I was figuring either Mechanized or footslogging Sisters with Exorcist support, and maybe some Repentia as well.