Test Pipes and Y-Pipe Question...?

[VAUROS]

I will be getting a '13 Nismo Z soon and I'm planning my exhaust mods. I do not want to replace the stock rear section but I do want to enhance the sound of the exhaust. Berk, FI and AAM seem to be the most popular options for test pipes, cats, and y-pipes. My goal is to obtain a deeper exhaust sound without too much added rasp. If I go non-resonated test pipes with a y-pipe, what kind of sound will that yield? I know if I go resonated test pipes the sound will be deeper but more subdued compared to non-res pipes.

Which non-res test pipes would yield the best overall sound with or without the y-pipe without producing too much rasp?

Thanks!