New car advice again... 407 coupe

[fuziduck]

Right, so I need some advice. Currently have this car: 320CD M Sport





I've owned it a year now and done 16k in it, but, I have always been tempted by these:

http://www.autotrader.co.uk/classified/a...?logcode=p





407 Coupe 2.7 v6 HDi.

Pros
Unusual looks - don't see many about, unlike my current car
All bells and whistles - heated leather seats, satnav, bi-xenon lights, PDC, JBL sound system, Elec mem seats, auto folding mirrors, lights, wipers etc etc
Good value for money
Comfy

Cons
High depreciation
Huge running costs - tax £400, v6 diesel mpg, potential FAP / ELOYS fluid issues, potential electrical gremlins (french), auto box issues
Massive - nearly half a metre longer than 3 series coupe
Not as involving as my current car and FWD (but would be better in the snow)

I'm hopefully going to test drive one tomorrow...

So what does everyone suggest, am I completely mad to even think of changing? Would it be a 'downgrade'???

Luke