Well, I dont know who can afford a lexus out of the box in there twenties...
But, I think Lexus should take a look at the Infinti marquee. Look at the relative success of the G35 coupe, create a coupe in the Lexus line up.
No hate to Scion, but make this coupe platform completely different from the tC's platform. The tC's platform is awful is my opinion, just a volume seller that does not have good quality, rather just a niche, that killed IMO a better car, the Toyota Celica. The tC's platform is aging and doesnt even offer enough in my opinion, I feel a Cobalt SS would be a better choice for a car if I was looking in that area. But, the tC filled its niche, its not meant to be remotely near performance but be a volume, rather generic seller that appeals to youth.
Lexus, create a sport coupe, so it can slot up against the 3 series, etc. and a 'F' model to bang up against the M3.
Here comes the dreams, kill the tC, use that Lexus coupe platform to bring back a Celica platform & throw the Camry's 4 banger in it.