Hey saad, if you've already gone ahead with the coilovers, my advice would be to chill on the wheels for a bit - wait for the coilovers to get installed and see how it drives for you when lowered.
If you wanna go really low, it's a good opportunity to get a feel for how the car & suspension react with the stock wheels/tyres re. handling, noise, stiffness, clearance (rubbing, scraping or bottoming out) issues. Then you will know which wheel & tyre sizes would be the best to go with. Trust me, once you're low enough you'll realise that you don't need a 19" on this car. And because you can run a 225 tyre on the 18's, you're less likely to need any fender rolling/pulling at all. :thumbup:
+ they will be lighter & cheaper than any equivalent wheel in 19". No to mention the cheaper tyres too! :headbang: