rig exchange is really subjective. I typically use paid profiles by Michael Britt because I think they sound better. But I have also created some of my own, and scoured a lot of stuff on Rig Exchange.
The one on Rig Exchange with good rating, I find to my ears generally sound pretty poor. Honestly some of the high rated rigs sound dreadful to these ears. But I think that's because of all the other variables in how people use their kempers.
My profiles are just how I like my amp to sound, and I'd fully expect a lot of people to not like them.
Check out some of mine and see what you think. Just search jkplaysguutar