I've ridden multiple SMP saddles and currently use both the Glider and the Evolution. I have medium wide sit bones so I may not have the same preference as you but I do understand what you are saying about the chafing as I experienced it with the TRK as well. I am using the Glider right now on my trainer and have had good luck. One common criticism of the SMP saddles is that they have a sweet spot for your backside and changing positions is less comfortable but to me I don't feel like I need to change positions as much as I did with my other brand saddles (Specialized, Fabric, etc). As previously mentioned it is tricky to find that perfect position for the SMP's but I have found it's pretty obvious once you have it right. SMP's aren't the lightest or the best looking saddles but for me they are the most comfortable.

When I went with the Glider for the first time I was able to try it from my LBS, is that an option for you? There aren't a lot of differences between the Pro, Avant, and the Plus but it seems like the Well is a lower level spec.