E70 Lowering Options - HELP..

[Best4x4xFAR]

Okay, so I’ve read the long thread on here about using H&R lowering springs (https://xoutpost.com/bmw-sav-forums/...lots-pics.html). I know Eibach makes a set of springs. I’m interested in dropping about an inch, but without sacrifice to existing ride quality. As much as I have searched and read online, I can’t seem to find any definitive answers on how the ride quality is affected.

I’ve also not been able to find out much about a multitude of other options:

AC Schintzer (https://www.ac-schnitzer.de/en/bmw/x...-e70-3552.html)
ISC Triple S Lowering Coils (https://iscsuspension-na.com/lexus-w...ing-p126116224)..

The AC Schnitzer Coils are of course German origin, and have TUV certification papers online, meaning they have probably gone through much more thorough testing that many other options?
And the ISC Triple S coils say they are specifically designed for “Comfort in mind and to work with factory shocks”

Making both of these options interesting..

And then there are so many more I can’t seem to find anyone using either..

Vogtland Springs (https://www.americanspeed.com.au/vog...wering-35mm-fr)
Megan Racing Springs (https://meganracing.com/suspension/t...-ls-bx507-4710)
Dinan Racing Springs (https://www.dinancars.com/product/d1...0-x5m-e71-x6m/)
And their ride quality and handling kit that is supposed ot be paired with their springs (https://www.dinancars.com/product/d1...0-x5m-e71-x6m/)

And then I also came across these ‘GodSpeed Project’ springs (https://godspeedproject.com/traction...0-2007-13.html), which are the only ones I’ve found that actually list a spring rate, but because I have nothing to compare it to (even a stock spring rate), it’s pretty meaningless..

I’ll be honest, the ride is already on the firm side (which I like), so I really don’t want to go any firmer..
My main objective is reducing the wheel well gap, but I’m not willing to mess up the ride and handling dynamics to do it..
As such I really don’t want to go more than an 1” lower..
I don’t want to end up bottoming out going through severe dips in the road at speed, something she currently handles very well..
Nor do I want to have to worry about being able to properly align the car..

Anyone have any experience with or know anywhere to find more information on any or all of these other options?