Thought I would chip in here

Its good to hear that many are liking the new Supreme brushes. However the new range is not intended to replace any of our current ranges, rather they have been released to supplement the range.
For many years now we have been asked to bring out a brush that was mid-way in weight between the Xtreme and the Super-Lite. We also have many clients who wanted more splay from the brush bristles. The Supreme range does both of these things and it is really hitting the spot for many clients. In fact one of our clients (thanks smithy) a couple of years ago sent us his 'ideal brush' which was a Radius Sill DT brush from which he had removed the lower part of the stock and bristles and just left the glass facing bristles. This brush looked almost identical to the bristle pattern on the new Supreme brush - naturally this client really likes the Supreme brush.
However as with all brush choices whether they suit your working method or preference is completely a personal and subjective thing. As seen by NWH, who has always preferred a limited bristle splay they will of course not be the 'best' brush for such clients as they do have the greatest splay of any of our brushes produced to date. For such clients who like a limited splay we have the Xtreme or Super-Lite 0° Splay brushes.
There is also the benefit to having a choice of brushes in your van, ready for different tasks.