220D Alloys - Need Advice

[shane1966]

Hi Experienced Ones

I have a 2007 lexus 220d, with the following alloys with Tyres as indicated below

Front - 225/40 R18

Rear - 255/40 R18

What i would like to do is replace the alloys so that i dont have to have such large wheels or the low profiles, i currently do over 30k miles per year and i seem to feel every bump and pot hole

If i do replace, what size can i go to, and do i need to have bigger wheels at the back compared to the front

Also if i replace them, what sort of cost could i get if i was to sell them, they are a bit scratched, front two have more damage than the rear due to kerbing

Im hoping someone can help and giuve some advice

Thanks in advance