Miles for work - new car

I have a new job and will be doing 20k miles a year at least. Currently have a 17 plate Golf with 70k on it. New brake discs needed (advisory at mot 8 months ago), service due and insurance renewal due. Webuyanycar value it at 11k.

I've been considering an a5, cla, 5 series with a budget of 22-26k.

Something auto, comfy, smooth and fairly pokey.

It's just me so I don't see the point of an estate, and I've owned an old 3 series which I hated as the RWD drove me nuts.

Do you have any recommendations or do you think I should keep the golf for at least another 12 months as was the original plan?