Hi Wendo
The HEQ5 has a rated capacity of 13.5kg. For astroimaging, usually it is best to keep well under the capacity, even as low as 50%. But let us assume that it will run happily at about 10kgs.
The weight of that scope is 5.18kgs so you only have 5kgs to accommodate camera, guidescope, cables, etc. Can be done just make careful decisions. A fairly light DSLR, a small guidescope (say a 50mm or 60mm) would work OK. Generally speaking, these mounts start to run into weight issues once you go up into 4" refractor territory. On the plus side, if you do control the weight well, the mount is very capable.
I have not used WO gear so cannot comment on that part of it.
The AZ4 mount would be very limited for imaging, if looking for long exposure, much better off with an EQ mount.
Cheers and good luck!!
Malcolm