There are NO creature comforts in the SRT. The C6 makes a much better daily driver. The Viper is a toy that has no practical purpose ... it does put a big ass smile on your face and does draw a lot of attention though /images/graemlins/toothy.
You don't get in and out of this car, you put it on. Entry/exit will challenge most people but once you are in, the seats wrap around you and are quite comfortable. I have a Corsa exaust on this car and have not found the cabin heat to be bad at all. The "side sills" do get very hot and will bite you if you are not paying attention. It also tends to follow every little rut and groove in the highway so unless on a very smooth surface you will be bouncing along and correcting often.
The C6 is more comfortable, is more roomy and gives you much more for your money. The SRT is very raw has very little room and is essentially, big motor, big brakes, big wheels and tires ... that is it. My wife hates it ... that's a good thing! /images/graemlins/wink
Bottom line is this. If it is going to be a daily driver or used for things other than racing/cruising get the Vette. If you have another "practical" vehicle, go with the Viper and Hang On!!