Just to add another opinion, although I drive a skyline 350gt my exhaust system is a zed one.
I needed a system which was as oem sounding as possible after having the old bill round due to neighbours complaining about noise levels (I was previously running berk hfc, japspeed y-pipe and east shore racing k1)
I did a fair amount of research (on here and youtube) and was lucky enough to hear both some Zeds and 350gts running different systems, in the end I took the chance and brought a japspeed k2 (same as toyosports one, if you search japspeed k2/toyosports on here you'll find some people have a nightmare with fitment and build quality) from eBay for the grand sum of £120 shipped...had it not been this price I would have definitely have gone with either the cobra or scorpion systems.
The exhaust note is slightly deeper than oem and it can drone a little over 3k revs but overall I'm happy with it, I'll be adding the berk hfc back into the mix early next year to see of the sound levels are still reasonable.
Hope this helps
Sai