To me the Superleggera is pointless. Lamborghinis are bought to show off. They're wild colours, loud noises and outrageous styling -- and fast. If you want something to get serious about on the track, Porsche has its GT3 and Ferrari the Challenge Stradalle cars.
If it were my money (and obviously if you're looking at Lambos, you've got enough money to have already bought everything else you NEED), I'd go for the Gallardo Spyder. Or save for an extra while and get the even more outrageous Murcielago. In orange.

For those who are a little unimpressed with Lambos... you need to see and feel and hear one in the flesh to fully appreciate what they do to people.
A few weeks ago when visiting friends, I opened their garage to find (among other treasures)... this beasty waiting for me to drool on it (sorry for the crappy pics):