Your posts sound a bit hypocritical. Yes the CT may not be to your taste but it has a function and owners tend to love it, hence the masses of owner reviews about it being so good. Its also due a refresh as it came out in 2011.
The C250d is hardly underpowered at 6.3s to 60. You can't use that in daily driving anyway and the torque should be enough. Still not fast enough, heck just get a C300 then.
You mention 335d but dont want a diesel, get a 340i then or an M3, job done.
You wont look twice at a Lexus RC-F but are happy to look twice at a BMW, Audi or Merc right? See what I mean about hypocritical? I question why you would get the IS300h in the first place if you're looking at cars which are much faster.