Hi fellas thanks for all the good replies, Yan, yes I'm veering towards the 17's simply due to ride quality, fuel consumption (I know I'm driving a diesel with good MPG but I wanna keep it that way, you guys know how much fuel costs these days and I don't see it getting any cheaper!)
But also veering towards 17's because I'm not looking to lower my car and I'm not sure if 18's would make my car sit too high??
In other words if someone was to really talk me into the 18's and assure me that all of the above would be hardly noticeable then I guesss I'd really be spoilt for choice with options for 18 rims, as there are so many that would look the part.
What do you guys think should I be disregarding the 18's altogether, do you think some nice 17's would be a good comprimise seeing as I'm rolling on little 15's at the mo?
Thanks once again for your input.