Sorry mate, those "stock" seats are awful in a Nismo, IMHO. Nice colour and all that, but they just don't suit. The Mk1 seats are fantastic on a long journey (2+ hours), the 'stocks' are pretty uncomfortable on longer journeys (my mrs always complained, although I could stick it out a bit longer).
You would have been cheaper keeping your black edition and just adding the body kit (although all the suspension goodies would have been lost)
As long as your happy, that's all that counts.
The Recaros in the Mk2 look the part, but other than track use, possibly, are a fairly cosmetic, more uncomfortable solution.
Just my honest opinion, hope you return it to what it was like when you come to move it on.
Did you retrofit the heated element?, switches etc? One thing that I initially missed, but not at all now, was the heated seats (no need, obviously with the cloth)