Differences in saddle brands

[Stringinit]

I was hoping to get some insight from my fellow packers on their experiences with the different options in pack saddles. 

I currently have northwest saddles with standard rigging. My experience is that these saddles have served me well overall. I have had a few minor issues with in steep offtrail loads. Where my panniers would flop up, usually coming down steep uneven ground. Also I would get a little rubbing on the outside shoulders of my goats. Just to where it was breaking their hair, they never gotten sores. It just kinda looks bad with them having bald spots. My understanding is the slick material is what you want, where it kind of just glides across their hair and if you add any padding it just makes it worse. So I assume I'll have to live with it.

I put 150+ miles on my goats last year and will likely expect that from them every year. I am very conscientious about them carrying loads and really want to maximize their comfort while they are working. 

Does anyone have any extensive experience with other brands/styles of straps?

Butthead packgoats and Mark Warnke's signature saddle have a double breast cinch. Which seems like with that design it would support a load better in rougher terrain. 

Northwest packgoats has standard rigging and the mountain straps upgrade. What's your experience with the upgrade?

Bantam saddle has nice saddles too.

I'm on the market for new saddles and would like some fellow hardcore backcountry goat people's experiences with their own gear.

Thanks