Double low pressure steel 104s, two aluminum 40 stage tanks, trilaminate drysuit:
The breathing gas could weigh up to 27lbs (although probably less due to using helium mixes). For the sort of dive where this equipment configuration would typically be used we want to be able to maintain neutral buoyancy without dropping any weights even if the drysuit completely floods (loses all of its lift). Most divers find that a wing in the 55lb range works well.
We don't need extra wing lift to bring up a heavy object from the bottom; this is dangerous since if you drop the object the extra gas in your wing will send you rocketing toward the surface. It is safer to use a lift bag instead.