Hello, I don't often post, but hope this might be helpful. I have just bought a Janome atelier 7, which goes up to a 9mm stitch width. List price is £1500.
I am a dressmaker, and it has some lovely features. If you've seen the thread above, you'll know it was just the needle threader that is faulty and needs sorting out - the machine itself is a joy to use.
There are 2 cheaper models in the range, but I don't know what width they go up to.
The very helpful shop that I bought from pointed out that the 7 has all the features that dressmakers need, and the 'top of the range' machine is only worth the extra grand for embroidery.
I tried the equivalent Juki that the engineer said was, in his opinion, stronger and easier to service, but I did not like it at all.
Hope you find something that suits!