IS or Tiger

ARGO: It seems that for this debate, no matter which camp your on that the grass will always seem greener on the other side. If you have an IS, you may wish for a Tiger. If your in a Tiger, your gonna regret not getting an IS. Me? I am doing both trees so I can get a true feel of what I am going to want once we start over.
Now for my humble opinion, 50% of the time it's not the tank but the driver.....no offense to anyone.