Hello
I have Whiteline swaybars
BNF41Z Front Sway bar - 27mm heavy duty blade adjustable
BNR37Z Rear Sway bar - 24mm heavy duty blade adjustable
LINK
Whiteline Suspension for 370Z Z34 (2008-ON)
Made a world of difference, even running with stock end links. The Zed sits very flat turn in turn out - body roll is minimal. Of course with aftermarket decent suspension etc can only improve the sway bars full capability.
If I may suggest one thing - which ever brand you go with?
As aftermarket sway bars are adjustable, I would strongly recommend that you make no adjustments (other than manufacturers recommended settings) until you have the other necessary after market equip. To start changing settings while running stock everything else can/will lead to premature wear/breakage (usually while the car is in motion) and adversely upset the balance of the car.
Just to be safe than sorry until you have other mods to match/compliment/enhance swaybars.
Cheers