This is great fun, all in Japanse but well worth watching the SLK should have turned its Aircon off :D .
http://www.youtube.com/watch?v=FRJkvpct_CM
Can also be found at SLKworld
http://www.slkworld.com/slk-videos/3716-tsukuba-battle-boxster-vs-slk-vs-m3-vs-350z-vs-tt-vs-nsx.html