Gang--can you recommend bike shorts that provide adequate protection from chafing but do not feel like a diaper?

I have a few brands of of bike shorts, pearl izumi, canari, rls,etc.. What might be one woman's comfort is another woman's mega-overnight-post partum kotex?

BTW--I have a 36" waist so my existing bike shorts are from the men's department--as the athletic world assumes that any active woman is age 20 and size zero.

FYI--for rides under 30 miles I just wear cotton fitted bikey-style exercise shorts with no chamois.....Any ideas for next year's MS 150 ride?