For me it is easy -- I have all but one of what I consider the ultimate horns -- now at 47-years of age I need to learn to play them!!!
My ultimate horn is my Bach Strad with a Harrelson 750 modification.
I also love my schilke Pic, Kanstul flugel, and the Bach Strad I still have from when I was in 7th grade. I could practice 10-hours a day and never play at a level that is too good for that selection of horns.
The one horn I don't have that I would love is an Eclipse LC. I think it matches mmy style of playing. I would also love to play any of Jason Harrelson's new horns. His modifications are amazing, I can't imagine how good his horns made 100% by his design could be.
We are blessed to have so many fine horn makers in the world today. I could have named 25 other brands/names and still had more good horns that I would have left off my list.