Any of you guys play with the T/C Contender G2 or Encore pistols? What's the difference?

Say a guy (me) was looking at a single shot pistol to play/hunt with and had no intentions of making it a rifle/muzzleloader. It kinda seems like the G2 would be the way to go. Or am I off? What's the basic difference?

Will the one frame work with any case, including rimfire? What's the going price for a new G2 frame?

Thanks in advance for any info!