Eibach springs have a very good ride quality and a pretty low drop. I certainly wouldn't go lower, mine does scrape every now and then.
Had tein springs before and it didn't quite lower enough for me and the ride quality was hideous.
Drop that @*!# to 2nd yo! And watatatatata your way past!
I do most of my driving on A roads so i'm already doing quite a good speed so 3rd is always good. 2nd gear would certainly get me a very disapproving look from my other half
what a strange question
3rd gear is my usual for fast overtaking but it totally depends on what speed i'm doing, what road i'm on, weather conditions, how quickly i want to get past someone etc etc