Hi fellow bimmer riders!I'm thinking of changing my standard 528i Goodyear excellence 18 inch RFTs that came with the car to cheaper 18 inch RFTs. However, I don't really want to sacrifice on my safety through lousier thread tire structure, tire threads wearing off quickly, etc. Therefore, I was wondering whether anyone here has changed their tires to other 18 inch RFT models. If so, it'll be great if you can provide your 2 cents here on the new tire model that your car's wearing! Also, it'll be fantastic if you can provide the price as well!Thanks in advance!