I say ditch the fangs. Those who want them can keep the stock facia and do a lip spolier.
Always liked the Nismo Version 2 on the 350, looks similar to what Bster posted with one center airdam. I beleive it was styled after the Super GT Z and had ducting to breaks, oil cooler ect.
Zele makes a pretty nice kit too:
ZELE 370Z Complete Edition Proto at TAS2009 | Demo Car | NISSAN GT-R Tuning: Zele Performance Global Website
By the way I think those dual titanium tips look hot!