Exhaust choice and 2 step my car

[Twilight]

Hi guys, new to here, these days I want to have some new exhaust on my 2016 370z nismo since the stock exhaust is way too quiet even with nismo tune.

I am looking at FI's exhaust with 18 resonators and the problem is i am not sure how deep the sound is gonna be like, i dont really like those crack noise and high tone, what i am looking for is deeper roar, even for 2 step, i dont really like those pop like gun shot, instead, i am looking for some pop that is deeper, any suggestions? Thanks a lot!

BTW, I am looking at tomei and HKS as well, but my buddy told me tomei would be super noisy on 370z, for HKS I dont really have any thought about how good it will be, since all camara have auto gain, you can not really hear how loud it is gonna be like.

For 2 step, my buddy suggested me go with aftermarket ecu with more options for map, but not sure which company have good maps for performance and 2 step pop. (I have a K&N cold air intake for my car, or if you want call it HOT AIR INTAKE LOL)