Spacers on a non lowered cup

I've been looking at the rear wheels and they seem lost in those arches, has anyone ever fitted spacers without lowering the car? any photo's? And do they adversely affect the performance of the car?
 
Im currently running 25mm spacers all round with standard ride height. It looks a little 4x4 at the rear but if the wheels are clean and a little tyre shine on its not to bad. The wheels sit flush with the arch. I don't have any pics at the moment and as for proformance, normal day to day driving I have not noticed a single difference. Had a quick blast down some country lanes the other week and the rear end felt a little twitchy, but this was pushing it. Normal law abiding driving you wont notice a difference.

However im getting eibach pro strings fitted soon.

Will sort some pictures tomorrow.
 
i'm running 16mm spacers and fitted them before i fitted my h&r springs,sorry no pics but i personally wouldn't go any bigger unless yr going to sit the car on its arse or it will look like a beach buggy
 
I'm thinking of putting spacers on my 2010 200 but wasnt sure, it's not lowered but the wheels look lost as they are. Any ideas on what size spacers would look ok ?