I've recently put some Uniroyal Rainsport 2s on my 147 and found it wandered a bit on the motorway with the recommended pressure. It showed up as a need to correct direction slowly where the previous Kumhos didn't, I had the tracking set to parallel with the new tyres so that might also have contributed.
I read that the sidewall on the tyres is a little soft so I'm currently running 2 or 3 psi up - just under the heavily loaded recomendation in the owners handbook - and wandering has almost gone I may go a little higher but want to live with it a while.
It is at least cheap and quick to put some more air in but there are some well-known downsides to increasing the pressure too much.
Give a man a fire and he's warm for the evening.
Set a man on fire and he's warm for the rest of his life.