[texasjohn]

Some useful advice on here.

I had an F10 550i with a huge spec. Couldn't actually get comfy in the comfort seats but found regular M sport seats to be nicer.

Surround view and reversing camera were great but I could live without them. Best things are the sunroof (standard on M5) and the HK.

I am looking at options with a view to ordering an M5, will probably go for HK and lumbar support, and that will be it. I like the 20s but will prefer the ride on 19s, so no wheel upgrade for me. I'm sat on the fence regarding split fold. Would love B&O but too pricey.

Possibly the extra 12v adaptors but I guess you get a 12v socket next to the ashtray anyway.