I got a little further in the game...
Theres a circuit called 'Circuite de la Sarthe', it is and absolutely awesome track, rather like the 'Isle of Man' bike race circuit but for cars. In it you can hold the exelerator down for 2 -3 mins full throttle in the LM cars = speeds of about 370 -380km/h... "so what" I hear you say? Well in GT4 the sensation of 300km/h+ speeds has improved sooooooooo much, you'll almost crap yourself everytime you get in a real racing car!!!! Seriously, this is THE ultimate car simulation, bar none
I also got the 'Carbon R'... built by Power House Amuse, it's a carbon bodied R34 GT-R with 600ps standard. It has spectacular handling on the circuit, well, with only 1100kg to lug around it had better handle good!
... and I also got the 'Toyota 7'. It's a 1970 Can-Am category car... this car is really special... in 1970 it had: carbon fibre and FRP body, twin-turbo 5000cc V8 (check out the pics to see the crazy turbo placement!!! Talk about a short exhaust pipe!) pushing out 800ps @ 8000rpm all in a 620kg chassis!!!
I love this game... I can't put it down.