Sorry I can't comment on the exhaust you cited.
Business up front: Best part of my exhaust is the idle is
super quiet, while 5k-7k RPM in either 3rd or 4th is
very aggressive
.
I went with this M2 exhaust
M2 Performance - CBS-NN09V2 - Stainless Steel Catback Exhaust System Ver.2 - 2009 Nissan 370Z Z34 3.7L V6 VQ37VHR. I got mine on eBay, but the server here at work won't allow me to access the site
For myself it met the criteria you set
"I would like to achieve a louder than stock tone with either the same weight or obviously less". And at $350.00, it was in my price range. The pipes are pretty durable, as I have bottomed out several times
on my 1.5 inch Megan Racing lowering springs here in the North with no mechanical/repair issues.