Welcome to the Touring world. I am also considering lowering the front-end as it does look much more "racked up" than a sedan. Only problem is lower springs lower it by too much !!!. It will spoil the rear ride comfort as the suspension becomes a lot more stiffer!.

Trying to find a compromise. And I am considering cutting the front stock springs maybe one coil or a bit less. Holding on to the stock rears as lowering springs for rear had about 4 coils almost stuck to each other giving very little "bounce", hence resulting in stiff rear!.

After a few week's drive, tell me how different it is compared to your 540 sedan.