I'd say black out everything but the tails. I HATE when people tint their tailliights - or headlights for that matter - it NEVER looks right.
Instead get blackline taillights! much cleaner look... and if you must, get black housing headlights.
all black is not too ghetto... I work in a professional business and have a jet black sedan with tint and black with polished lip wheels.. "some" may call it ghetto, to me it is very clean looking.
2008 328i E90 Jet Black:6MT:Premium:Sport:Walnut/Black interior:Xenon:MTEC V3 AEs:19" Beyern Mesh:35% Tint:Blacklines