Alright bud, I've got my Coupe lowered by 110mm with 17s. I have no problems with everyday driving. I just have to slow down a little bit more for speed bumps. You will feel the road more (especially if you have low profile tires - I have a 40 profile). More notably though, the handling of the car will improve rather nicely. I find corners can now be taken with a bit more speed and I rarely need to brake when I'm driving on country lanes (if I do have to, it's usually because of someone in front lol). I have a full coilover system from Spax. It cost me £750 with fitting. Hope this helps you mate.