FWIW a dressage saddle makes a wonderful trail saddle also. I use one for 20 years.
My treed saddle now is a Tucker Plantation. I think it's sort of a cross between English and western. It's a very comfy saddle and not too long...or heavy. I also have a Black Forest treeless. I do like it a lot EXCEPT it's best to use a mounting block or a log , big rock or stump if you have to dismount on the trail and want to get back on, unless you are really springy and can jump. It's also not great if your horse is reactionary, if you get my drift.
If you ever find yourself in a fair fight, it's because your tactics suck. ~ Marine 1SGT J. Reifinger