If I sit them at roughly the same height as stock, maybe a cm or so lower, it should massively improve the handling right? In theory as the dampener will be better and rebound not as bouncy as stock springs and shocks.
And can also go lower as and when I want to as well as doesn't take long to alter height.
I didn't want just springs in case I wanted adjustability in the future and saves having to change it all again.
If you don't want to go too low APs are probably a good choice, I don't think you can get a mega drop out of them as coilovers go anyway.
For reference, I'm down about 30mm on H&R springs and even at that mild drop it's certainly more composed in the corners, and there's no rubbing or any issues like that, so if you aimed for a similar drop on coilovers you should get a good result.
Just a word of warning regarding adjustment though, if you decide to adjust the height a while after getting them fitted there's a fair chance the collars will be seized on the threads. It's good practice to keep the threads clean or protected somehow. I had a seized collar on a set of Weitecs and I had to order a new collar, cut the old one off etc. Probs best to get the height spot on when you fit them and leave it at that.