You'll get closer to the 997's limits on the track than you would the other two, and you'd have a lot of fun playing with the fat rear end and the pointy front.
The GT-R will be considerably quicker than the other two, but it's still a big car that doesn't make a particularly nice noise. Stonkingly capable, but lacks the emotion.
The Lambo will be the most difficult to extract the best from, and the gearbox will drive you nuts, but you can console yourself with that noise and those looks, and the fact that it's a genuine supercar.
One's a Beetle, one's a Datsun, the other one is a Lamborghini! You can blag a test drive in a GT-R or 997 any day of the week, whereas I suspect getting a Lambo out for a blast might prove a bit trickier. A Gallardo is still £60K to buy, whereas you can pick either of the others up for £35K now. Drive something that is unobtainable, not common as muck.