I have looked through these threads and have not seen anything specifically answering my question, but apologies if it has been.

Which luggage brands do we feel has specifically the best wheels? And by "best wheels", I am talking about the actual "drive feel", the smoothness, the lack of friction, the trueness of the roll. I am mostly talking here about rollers.

A couple of tests I usually do to ascertain wheel quality are:
1. High speed stationary spinning on the axis, using as little of the luggage handle as possible. The benchmark here is how frictionless the motion is and how little effort is needed to generate movement. Likewise, the lack of any "drag" which might cause luggage to topple.
2. The "straight line" test, rolling and then letting go of the luggage to see how long, how smoothly and most importantly how long the luggage continues to travel in a straight line after you let go. The benchmark here obviously, the longer and straighter, the better.

This may seem obsessive (or it may not - perhaps everyone looking at this thread is the same!) but the wheel quality really makes all the difference to me and often makes otherwise expensive luggage seem cheap. Many of you may know where I am heading with this, namely that Rimowa in my experience seems to have by far and away the best wheel technology and quality of every roller I have ever tested. The "drive feel", to me, is rather akin to a Mercedes S-class and the quality shines through. Some other brands where I have tested (some of which I own) include: Samsonite, Tumi, Piquadro, Zero Halliburton. So far, no competition. ZH comes the closest but still noticeably rougher.

So are there any other brands out there which have great wheel quality? Ideally one less expensive than Rimowa tends to be? I am slightly surprised that this issue has not been solved by anyone else; indeed that it does not seem to be the central concern for luggage designers the world over. Maybe I am just weird.