looks a nice system, sadly can;t comment on quality as not seen before. i would say have a look at tarmac sportz website, they seem to have the widest selection for the 370Z.
if your serious about that exhaust i'd want to know what quality stainless they used it seems its T304 which is good, i'd be tempted to go for something with 321 or 347, but thats not common.
the only other issue is going to be fit. if its a good fit your laughing, if its a poor fit, then your exhaust fitter is going to have his work cut out.