Hi and welcome.
The car IS an amazing blend of limousine smoothness & edgy character and it sounds like you have found one of the good ones. Enjoy.
There IS a red immobiliser key, but it does more harm than good IMO. If you use it you can 'clear' the rollng codes and have to re-program it.
You can clone new immobiliser transducers from your existing key, should you need a spare set. Which is what I did with the 'Lude, since the red key has gone.
Nick
“I find myself irresistibly attracted to cars that nobody else buys. The NSX is a classic of the genre because nobody buys it and yet it’s a fantastic car. It’s got a wonderful compactness and simplicity and unpretentiousness to it. Honda rudely continues to make them whether we like it or not, even though there can be no commercial logic in doing so — I thoroughly admire that.” Rowan Atkinson