It'd be good to compare the Nismo to non Nismo 370Z. But I'll see what the dealer has, if no Nismo available, I can at least get the feel of the normal 370Z.
Good to know about the manual TT-RS - I'll look into them as well.
Phil, very kind of you.
I drove a couple of TT RS both manuals, one was completely standard from Audi dealership and another was a friends stage 1 car with anti roll bars.
The completely standard car is still a very quick car, I really cannot think of any sub 400BHP road car that is really faster. Off the mark just simply floor it at 1000rpm, no need to hold revs as the cars turbo and torque from the 5 pot give it some really nice low-down power and it will just go, the engine really is a master piece from Audi as it almost feels NA as the car has power throughout the entire rev range, not just 3000rpm and above, there is torque and power much lower down. I think the standard car hits 100mph in around 10s and more power comes very easy and low cost.
Handling wise there is a lot of grip but the car has strong understeer so much so I found it really fustrating on several attempts I put the car into a roundabout or corner and the car always wanted to push, even absolutely mashing the loud pedal did not bring the rear round at all, it just understeered more, was a complete mess at the limits of handling.
The stage 1 car even though was only around 60BHP more felt like it had over 100BHP more, in a straight line the acceleration was superb, were talking GTR quick and it sounds pretty good too due to the 5 cylinder and at this power levels 60mph comes sub 4s with ease and 100mph around 8.5s for what is a £500 remap. My mate did eventually go stage 2 and uprated clutch, but I never drove it but I think it gained another 20-30BHP and was hitting 60 in around 3s and 100mph in around 7s, he used to take it to the airfield days and run it against Lambo's, 911 turbo's and it beat them, simply because it was so easy to launch the car from a standstill with relative little stress on the drive line.
Handling on the car with the uprated anti roll bars, kept the car flatter but it still had understeer, the problem is Audi put the engine in front of the axle so there is no so much you can do, you simply cannot defeat physics on this car, yes you can improve it but end of the day it is still a FWD quattro system with a big heavy lump in the nose, if you can adjust your driving style to cope with understeer you can cover ground incredibly quick not much on the road would keep up with one but will you be grinning like a Cheshire cat or will you be fustrated because the car lacks true balance.
The other thing the Audi has going for it is the interior and overall quality, it will be far better and nicer inside than the Porsche or Nissan, is a very nice place to sit and commute in, it is also comfy as well, its a great all rounder and should only be dismissed if you want a car more focused on driving involvement and balance.
In the end my mate upgraded to a Porsche Boxster Spyder with less power, it kind of tells you everything really, he sacrificed power for handling and balance.
I think if you drive a Cayman S, 350/370Z and an Audi TT RS you will find it hard to resist the Porsche as the handling/balance is incredible, the engine loves to rev and the flat 6 behind your ears sounds so mechanical and great. The Cayman S is as good as it gets in a road car for balance and feel, truly incredible. The 350/370Z have stronger mid-range punch but compared to the Cayman simply cannot compete unfortunately for driving dynamics and driver enjoyment. The Audi is at the opposite end, supercar performance for little money acceleration wise but dull to drive in comparison. Drive all three and see which one suits you most.
Problem for me with Audi TT, no matter how fast one is, well its still an Audi TT and in fairness the Golf R is a better drive, no idea how VW did it but the Golf just has better balance than the TT, but pointless to mention as they are still rather new and very expensive unless you can still get them on the crazy lease deals VW was once offering.