Snipes

Lads, I'm sure this has been answered previously but I can't seem to find the exact reply to the exact sizes I'm looking at. Would i have problems running; Concept Concave rims at - 18x10 +20 all round - 235/40 or 245/40 tyres - Rolled front and rear guards If not what would you guys recommend running? They stock 18x9 +20 also, would this be more appropriate for the front and 10" +20 for the rear? I'm after an aggressive look that wont poke too much and id rather not run staggered but i also don't want to run Mexican spec either! Sorry for the ridiculously pedantic requests but i can't seem to get the right answer and I'm stuck! Help would be greatly appreciated! Cheers