Thanks for all the suggestions on pricing and the AfterShot comparison
I finally picked up X8 Ultimate (as a Black Friday deal) and installed it last night. First couple of things I noticed were how good it is with AfterShot to
not have to import everything into a catalog (just browse the file system), and secondly how quick X8 appears (64bit). The integration with Perfectly Clear (part of the "Ultimate" package) is also a nice little touch - as it seems to be a pretty good assessor of what to change.
Like many (I suspect) I've got quite used to LightRoom, but this bundle may just be a clearer way for me to catalog and process