the rims look awesome
one note: the larger the rims,the better it looks,BUT the worse the handling becomes.
if i were you i would stick with the 19s.
I have had the oem 17s on mine since i got it,and was just about to get the oem 18s cause they look nicer.
But as soon as i test drove my mates new v35 with 18 oems i changed my mind.
The car feels heavier,harder to steer and worst of all it feels slower.
I upgraded my old r32 from 16s to 17s and regretted the choice from day one.
Plus if you want to shod them with QUALITY rubber,it will cost you a fortune on 20s.
my 2c worth : )