I ended up purchasing DipTrace. The PCB editor has a large footprint library and imports a number of netlist formats. The schematic editor can export schematics to SPICE for simulation. It seems like a well-made piece of software. I haven't been happy with any of the FLOSS alternatives I've tried. KiCad is actually worse about imports and exports than many of the commercial packages I've come across. I need interoperability to avoid vendor lock-in.