I THINK the front was a 24mm adjustable and the rear a 20mm fixed? I'm not 100% sure as it was customer supplied but the front was an adjustable bar.
I personally like the idea of the (F) 27mm fixed and ® 22mm fixed if it was my personal street car.
They would be fine mate. I would have no worries about fitting that to my car.
I have 255/35R18 that I will be fitting to my 18x10.5 rims, 265s will be sweet
18x11 with even a '0' offset should be sweet with a wide body kit I would have thought.
This is what I do and would do in your situation.
1) Measure from your hub and work out how far out you want the rim to stick out (i.e front space)
2) Choose your desired tyre size you want to run
3) Choose your ideal rim width based on the tyre size (how much stretch etc.)
4) Now you know the rim widt you are going to order and how much front space you want - work out the desired offset of the wheel and order accordingly