They're a very tight fit on my Audax Mk 3, even after I took the mudguards off, but I'd rather be muddy & wet than dry and suddenly sliding along the road again.
So, the marathon wither tyres are on and I have my peace of mind. i wouldn't be riding again until March / April otherwise.
I've run them it on clear tarmac at low pressure, and boy are these monsters hard work!! My commute is up 10 minutes, to just over an hour now, but I just remind myself that the hard work is good for me, and look forward to putting the paselas back on in the spring.