Whats the best price people have been offered the Xtreme wheels for the Octavia VRS including tyres and fitting when buying them with there new car?

It changes dependent on tyre. I was quoted in excess of £1800 but skoda parts have the wheels on special offer 

OK, my dealers saying £352 per wheel, with goodyear tyres.

I paid £800 for the wheels (shop around) and then purchased continental tyre from camskill for £151 each so total of:

£1454 fitted.

I then sold the standard 18" gemini for £800 so cost me £654.

Have you noticed a huge difference in the ride comfort? I thought it changed the ride a lot!!

For better or worse?

Personally not with regards to comfort however only did 20mile on the 18". Id say road noise has increased slightly however i wouldn't say enough to not buy them.

For better or worse?

For worse.