The SS sedan will have a bit of exclusivity due to it being such a low volume vehicle. Pretty much one won't be built and shipped to the US unless it is sold. It may not have the brash design of the SRT8, but that may help with keeping the cops off your back when speeding.
And judging by Pontiac G8 resale value( especially the GXP's which is the predecessor of the SS), the SS sedan may hold its value fairly well.