19/20 in wheels on a dynamic

Was wondering if anyone specced a dynamic with 19in wheels? Am considering it as 19inch wheels should hold up better offroading to some extent, and hopefully wear better also.
My memory is beginning to fade from my test drive also. Anyone test drive cars with both wheel sizes and same setup(ie both AD or both standard setup). Any noticeable difference in ride quality?

IMHO the Dynamic just has to have the 20"s to carry off the whole persona of the vehicles styling.

Just sopke to my dealer and he said for £390 will cover the cost of punctures in tyres and refurbing the alloys(5 times) over 3 yrs. Sounds ok value to me. he said if I downgrade the alloys I couldn't use to price differnce to get anything else(was thinking of getting contrasting pano roof if i got a credit for 19 in alloys).
so guess sticking with 20in wheels. Still curious about ride quality though, if anyone has tested them side by side. LR dealer said 19in wheels were better(his personal opinion)

19" wheels are better for off road use (18's would be better still!) because to get the rolling radius the same you need more sidewall = less likelihood of scuffed alloys, however if you venture into deep ruts or deep mud you will still get marking of the alloys. So far none of the folks I have spoken to seems to know if off road damage is covered by wheel & Tyre insurance.
I took my Evoque on a gentle off road drive that had deeper ruts than I expected, no damage to the alloys off road, scuffed the front nearside one pulling up outside the village shop to buy my sarnies for lunch though!