RUFST

First off what should I get the chrome 10 spoke SS wheels from slp....or the 18x9.5 ZO6's

If I get 18's will they fit w/o doing anything...ex:grinding,cutting, I just want to bolt them up....also WILL i need to lower my car after putting on either of these.....NOTICE that i have RS ground effects...if i lower it will it be toooo low as to where i can't drive it...i couldn't find any pics of any camaro on here with 18's and ground effects like mine

also if i went with the 18's ZO6 where's the best OER to get from....and i'd prefer not aaarims

Thanks guys,
BTW i've been searching all morning and i know there's alot of post on here about ZO6's but not about the backspacing all that's new to me I want one's that will fit and not rub.