1st up awesome rims. Can't wait to see them on the riceburner.
265 are basically 10.5 inches wide....so if the tyre doesn't fit under then the wheel might have problems.
235-255 are ideal for the front. (Have a look at the green goblin next time it is in the car park, they are 245's on a 9" rim on the front)
As for rolling guards there is a mobile dude that does it for a reasonable price i believe, his details are in a thread here somewhere. But if Wheel Revolutions can do it all, i'd be seeing them.
Good luck.