Aramas all the way. I believe it’s by far the best quality out of the three. It’s extremely nice for the price point, as is almost any Harmohn Kraft product (they also have a nice line called Americana).
With Bobby’s, it depends on the line (they have at least a couple, with their Signature Series being the highest end IIRC). The higher end stuff is decent (I have a couple of older pieces and I would compare it to the older Miller’s Collegiate strap goods from the '90s or so if you’re familiar with those; nothing too fancy, but solid and do the job), but not as nice as Aramas, and the lower end stuff is your typical economy type bridlework.
I haven’t been incredibly impressed with most of what I’ve seen of anything KL Select, but specifically Red Barn. It seems to have a plasticky, painted on finish to me, and I’ve seen a few that seem to wrinkle and look cheap after some use. Just not my cup of tea. As far as KL Select in general, I’ve just found other options in or around that price point I personally like better.