For a new one. $80K fully equipped (except no blutooth available to listen to Pandora, etc.)....... It is very sweet ride, a little harder to get in and out for an old guy like me,...I drove several CTS Vs (also Audi, Lexus, and C7) before going SHO..... better buy a lease return or used if you want one in a couple of years.... I looked hard. My decision points were close, but I can destroy a fully equipped and modded SHO at 400+ AWHP and replace it (including mods) for the cost of a comparably equipped new CTS V or Vsport. That said, I do like them...definitely sweet!
For now, I'm in this platform... and I bet by 2015 Ford has factory HP above 400. The 3.5 EB has a lot of headroom as far as tuning and plumbing. EB and others have hit 600+AWHP in a 3.5 TT EB and used it for years, including racing and DD in the same car without compromising the engine.
Just the rambling thoughts of an old guy.