They are fun cameras, but they are heavy. I have one, then upgraded to a 6006 to get removable backs. They're fun to use, and I like that you get auto exposure with a WLF.
I had a 6008i at one time. Fantastic camera, wonderful pictures. But somehow it made me nervous. Too high tech, too much plastic, too complex. That's when I moved on to Hasselblad. These days, if I wanted movements like the SL66, I would look for a Flexbody. But those are very difficult to find with all the (7) components, and rather expensive.
Regardless of the SLX qualities, of which I do not have first hand account, I do not see the reason to switch if you already own an extensive Hasselblad V-kit. If motorized film transport is the reason, just add an ELX/ELD to your collection. Otherwise you need to invest a lot of effort and money to replace your Hasselblad with another 6x6 SLR system that is pretty similar and even uses the same lenses, if only with a different mount.