Hi glos guy
the only noise I hear on the motorway is a bit of wind noise around the wing mirrors and the different surfaces ie the concrete and shell grip but much quieter than my st3 the x1 is running Bridgestone tyres,the x1 only has run flats that they seem to attribute most of the tyre noise to if you spec the 19 inch wheels I was more than happy with the 18inch standard diamond cut 566 wheels. Regarding the seats they are well supportive around the thigh area I have 35inch legs so long and I’ve had no issues with a drive in excess of 110 miles so far,the only issue was mine took 9 months from order to delivery but COVID had a massive hand in that.any further questions by all means ask I’m more than happy to help.