I prefer Montegoblue and its actually close to Lemansblue perhaps a little lighter. It would be my choice if Lemansblue didnt exist.
My dad was looking on a Montegoblue 3-series but it was a bit to flashy for his taste and in the end he pick silver.
But if I were you, I would pick Montegoblue, its a very nice colour

^ He did

Don't they offer LeMans blue on 3-series in Europe?

only with M-package

Yes indeed that only comes with the M package, but I saw them both the same day and the difference is not big (talking about the colours just to avoid misunderstandings). Of course the M package is much more beutiful, but unfortunately a little to expensive. But I aint complaining

Great decision - great car. Have fun with your new bimmer!