Im in the same quandry and about to do the deal too.
I like fawn leather, but its not too masculine. it looks more expensive though and looks great with a black exterior. looks more luxurious but very lexusy and dare i say japanese.
The black leather has the darker timber which i like as i HATE woodgrain anything.
looks more sporty. and more manly but the fact that its leather sometimes dissapears as its darker.
.....not helping am i :-)
jas