Warren, if watching the "youtube" clip gave you a woody, you wait till you get into the drivers seat and get into her a bit!
Seriously, the LS7 is simply awesome....I've clocked up about 1500 kms since rego late last year and 90% of my driving has been very sedate cruising and the LS7 is an amazingly smooth motor that feels like it's got endless torque and is perfectly happy just pottering along at just above idle....When you get that "stirring feeling" and you fancy a bloodrush, put the right foot down a bit and instantly you're in different car, not thinking about anything and unable to stop smiling!!!
In all honestly, I think I've have the motor working at 10/10ths for probably 3 to 6 seconds at a time for a couple of dozen times or so and it's only then that you understand just how close the emotions of fear and excitement really are!!
My 2 cents worth - go for it, you won't regret your decision!
Regards......Paul