I don't have the xfire anymore - it went back to the leasing company at the end of the lease, despite my desperate attempts to extend the arrangement - but, I managed to get it up to the limiter 150+ mph many times.

Had a couple of good runs on the Autobahn in Germany near the Nurburgring, and the car was rock solid for miles on end. Also had a little run on the M6 toll road here in the UK, where I was near the limiter and a BMW Z8 appeared to my right. He accelerated off for a while, then realized I was limited so he came back and just sat next to me for a few miles, before giving me a wave. Very close to the best fun I have had in a car - certainly the longest sustained high speed run anyway...

Yes, yes. Bad behavior I know.

:-)