"my LS8 will out dance most any sport compact...."
Not trying to rain on anyones parade and I'm glad that you are enthusiastic about your car but PLEASE....let's get realistic here. While the LS is a very well engineered car that handles better than most in it's segment IT IS NOT A RACE CAR! With all of the standard tweaks and good rubber they can be very capable and entertaining cars to drive while still being somewhat comfortable and refined. The biggest problem is size and weight. Pure and basic physics. My car, with the mods below, stock suspension and a good alignment pulled .91G on a skid pad and has been run through it's paces on both a road course and AutoX course. While it surprised everyone with how well it ran, it's limitations were also very evident. First off the car is underpowered. Not the fault of the motor, (mine is making around 1.3 hp/ci, VERY good numbers for any NA motor) but at 3.9L it is simply too small. The stock brakes with drilled/slotted rotors, SS brake lines, good fluid and Porterfield R4-S pads will get you some very good stopping distances for a few runs. But on the track it is very easy to use them up in a hurry. 4000 lbs is alot of weight to be hauling down repeatedly. Short of a Stop Tech or Wilwood big brake kit that will cost more than your car is worth and the need for custom wheels to clear them, the LS is underbraked. Tires and suspension? Again 4000lbs is alot of weight to be hauling around. Due to the cars design the largest tire that will fit is a 245F/275R without rubbing under all out track conditions. Not enough contact patch to overcome all of that PORK. In one afternoon at RIR I destroyed a set of nittos while a friends lightened M3 with the exact same tires looked hardly worn. Short of stiffer springs there is not much to do to an LS.
Reality is a good driver in a stock Golf GTI or Civic SI can run circles around your modded LS on a road course.
Respect the car for what it is. It is a LUXURY/SPORT sedan. Refined, comfortable and entertaining to drive at 8/10's, push it to it's limits and it will bite you if you are not careful.
One final rant....Who cares? The limits on the LS, bone stock are already high enough that no where on the street can you reasonably explore them without seeing speeds that are going to get someone killed or put in jail. Trust me when I say that for 95% of you on this board, stock, this cars limits are higher than your ability to drive it. Without professional training and lot's of track time none of you really know how to drive any car to it's limits safely.