I sense from a far that Denise and I have much the same taste in fit and function (red Sidis for one). Knee warmers are always a good option but sometimes I can't stand the extra elastic.

I have not tried the PI knickers for 2 reasons: not impressed with the SMT chamois they use in this knicker (though I am a BIG fan of the ultrasensor chamois) and because they use 6 panel construction.

Shebeest uses 8-panel construction which seems to stay in place better. It is traditional ergonomical short construction. The Shebeest chamois is fine for me for all road rides except centuries. It is my chamois of choice for mtbiking because it is thinner and more flexible than the PI ultrasensor chamois. I have both the Shebeest knicker and the comparable Terry knicker. The Shebeest is my preference.