blau
3536
5320
Here's why: it's got its own thing going. And it looks great! I love its sporty/vintagey/casual vibe and have been surprised it hasn't been a huge screaming sells-over-retail success.
The 5140 is great, too... but, to my eye, it's a slightly lesser version of the 3940. So to me the 5320 wins because the 5140 is neither here nor there: if you want its slim and timeless style, get a preowned 3940.