Erm, since I did answer this when they first came out.................
Having spent a small amount of time with a cs1 I actually preferred the M2 for feel.
So if you havnt made up you mind, try and grab a go on an M2.
I also have an LV1, which I prefer over the cs1 as well.
But, the cs1 is a nice balanced marker (just for Tom).
(Yes I know this is the eclipse section, but when your dropping a grand on a marker, then you need to try out all choices.)