Hugh,
PSP 2018 has come leaps and bounds over the past few years and certainly has the PS user in it's sights. Definitely a serious contender for post processing.
Startrek,
I'd try to find a software package which will allow full control of your camera(s), interface with your mount for guiding, filters, focus etc. and do all the pre-processing of Darks and flats as well as stacking etc etc. I've found AstroArt works well for me. It also is pretty good in the post-processing!!
http://www.msb-astroart.com/