I think a large majority have Nav. So if resale is a consideration...
Although I think there will be at least some enthusiasts seeking the non- Nav and 6MT optioned cars years from now...
I much prefer the dash without Nav... but if you prefer it with the double hump... get what you want more.
2013 M3 coupe (Azurite Black, Black, Piano Black)
+ miata nut (2 miatas) + Mk6 GTI 5-door hatch (our mini-SUV