Having a look now, and the Q5 within the price range is the 2.0L TDI S Quattro, and it just looks a little underpowered at 130KW and 380Nm torque. The gadgets look impressive, although they're all bloody optional extras inevitably making the price horrendous...
If you are going to consider the Q5, then you must drive the 3L TDI - 180 KW, unbelievable speed and plenty luxury and superb road handling. In fact test drive it anyway whether you are considering it or not, its worth it.
The 2L is just not strong enough.