Yep, glad you weren't hurt man.
It hurts though to lose a car, I know the feeling.
One thing you may want to keep in mind...if the engine isn't destroyed, you could buy the car back from the insurance company for 10% of what they are offering you. I know a guy who trashed his mustang cobra and the insurance company gave him $12k for it. After they gave him the $$, he said he'd like to buy it back, so he got it for $1200...the damage was in the rear end so the interior, engine and most of the drivetrain were still nearly perfect (including the thousands of dollars of modifications he'd done, which were EASILY worth $1200). So...if there's anything you can use or sell, you might consider buying it back to recoup some of your loss, and have spare parts in case anything goes wrong with your new GTO (if that's the route you go).
I agree with the others, in almost ALL states, the driver is responsible for the car they're driving, so YOUR insurance won't be going up unless your buddy doesn't have insurance. This should be a "no fault" accident for you. However, his insurance company is gonna hate him.
For future reference, if you hit the animal, all damages are covered and the incident is considered no-fault. You swerve to miss the animal and hit something else and the accident is considered your fault. I had to learn this the hard way. A dog would have done a fair amount of damage, but probably not as much as a telephone pole and a fire hydrant. That's really harsh sounding, but that's the way it is. (by the way, I'm a dog lover, so I am not advocating hitting every dog that crosses your path).
Good Luck getting this all straightened out. You've got your health, so do your friends, so that's really what matters (even though it doesn't really make you feel any better when you look at where your GTO is *SUPPOSED* to be in your driveway/garage). Please keep us updated if you decide to go with a new GTO or not.