Advice on an 2.0 TDI A4 S Line Multitronic purchase

Hi all,
completely new here and imagined it's best to get the thoughts of some owners here, so here goes...

Thinking of buying a 10 plate 2.0 TDI, white S Line, multitronic, A4 from a main dealership. 35k on the clock, in great condition (a few minor bonnet/bumper chips which I noticed, and the dealer instantly said he'd have fixed in the body shop).

It's up for £18k and he offered me £7k for my 57 plate Civic Type R GT which has sat nav, voice and bluetooth (£500 above part ex, and basically dealership price - it's in excellent condition and will resell no problem). Told him straight away the A4 is only worth £17.2k according to Parkers and so we're £300 shy I reckon of a possible deal (he knew I wasn't up for playing with or ripping off). Going in late tomorrow for a test drive as I've not driven one.

Any pitfalls or advice on this model? Heard they're a bit harder on the drive compared to normal models, but I'm used to firm ride in the Type R! Am I daft for trading in my pocket rocket which hasn't given me a days trouble, puts a smile on my face with an insane whine of 9000RPM?! Obviously I'm looking for something more practical, cheaper to fuel and insure, yet is fun, refined and is a bit special.

Any advice appreciated.
Thank you.

Thanks jojo. I'm willing to sacrifice watching the fuel needle moving with the Type R to something that's more refined, handles well and looks good! I was considering a Merc C220 or C350 as a first choice, but would now only consider the new face lifted model against the A4 S Line. I'm not expecting Type R madness, just looking for advice on the car and if I should take the plunge. The girlfriend has an '09 A3 1.9TDI which feels and drives fab. Hence my teetering towards the A4.