Came back in to update this - I've posted on a few Powerflex Engine Mount threads but I think this is the main one -
Car went in for a Full Service yesterday and while it was in I had the Upper Engine insert taken out, and the lower engine mount installed. The difference in vibration is HUGE, it was definitely the upper mount causing most, if not all of the vibration in the cabin. I've left the Torque arm powerflex mounts in too so now running with Powerflex Torque arm + lower mounts and then the upper engine insert is just stock/OEM.
As soon as I started the engine I could instantly tell a difference. The steering wheel wasn't vibrating, there was almost no cabin noise at all, and the big advantage, the car seems to drive exactly as it did before, everything is just as tight and responsive, just without the added vibration and cabin noise.
It really is more relaxed/enjoyable on the daily drive now, and I'm sure will be much easier on the ears at motorway speeds!
My recommendation from here on out, is that the upper engine insert is only really worthwhile if you're using the Clio as a track day car. On the road, and daily use, I can't see that it makes enough difference/any difference to bother putting up with the extra vibration/cabin noise.
