I'd get rid of the E63. And hope (like hell) that I find the BMW seats get on with my spine.
I did quite a few 1000km journeys in my e61, always got out feeling good*. Maybe borrow one to try. If you're thinking m5.
My Volvo has comfy seats...
@Dammit started
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I'd get rid of the E63. And hope (like hell) that I find the BMW seats get on with my spine.