My 2 cents may be slightly different.
I already think you guys are on the right track with the Cordura and SuperFabric materials you're using in the Navigator and PowerShell suits. From all I've heard that's good stuff.
There are way too many threads on ADV with debates on Motoport's kevlar vs other fabrics and whether their armor (Tri, Quad, whatever) is really as great as they say it is. One thing I think most will agree on is that Motoport appears to have the best armor coverage. I've considered getting an Aerostich or one of your one-piece suits for commuting, but what keeps me using Motoport besides the fabrics is the amount and placement of the padding.
So, for me, I don't have to have kevlar if I can get Cordura, Super Fabric and all that for abrasion resistance. Just make sure I'm padded up like a bubble-wrapped egg and I'm good to go.
Gotta get a sig.