I think you get the general point from prior posters, Sam, that prep and
drying conditions count for much more than paint brand. Within brands, I
tend to go with the premium line, as they tend to have better or more
pigment, e.g. hiding and flow-on characteristics. Totally agree with
avoiding sun while applying, especially if is hot. We have had good luck
with Sherman Wms, Ben Moore, and Kelly Moore (currently going on 13 yrs with
only touchup needed), but highly focussed attention to wire brushing,
sanding, caulking, and priming. Underlying siding material, extent of eaves
overhang and hours exposure to sun/rain (e.g. orientation of wall) also
makes a huge difference, from house to house.
Thanks everyone from the input. I have learned quite a bit!