Upgrade from RX100ii to A6X00?

[BFRedrocks]

FWIW, I shoot the a6500 in a Nauticam housing with a pair of INON Z-330s and love it. For macro, I use the Sony 90mm macro lens with the associated ports, and for wide angle I use the 16-50mm lens with the Nauticam WWL-1. It's quite a nice setup and I've had a lot of successful photo shoots with it. If you're really interested in the a6500 and housing, I might be willing to part with it for a pretty good bargain. I have some decent topside lenses for the a6500 as well. DM me if you're interested, but regardless, the a6500 has been a great option for me diving all over the world.

 

[RVBldr]

Just as a datapoint, there's lots of rumors on a forthcoming A6700 release very soon, which looks to be a great ASP-C mirrorless. That assumes that Nauticam would probably be one of the first to release a housing for that new model. Rumors are that it's going to be just slightly bigger than the previous Axxxx model, so about the same as the A7C.

 

[Hoag]

First a bit of a disclaimer for transparency. I have GAS - Gear Acquisition Syndrome. I am always looking for "shiny new toys", and just this week, I ordered a new Nikon Z8 for use above the surface.

Underwater, however, I shoot an A6000 in a Nauticam housing. I am a firm believer in what is "affectionately" referred to as the 95/5 rule of photography, which states that 95% of what makes a great image takes place less than 5 inches behind the viewfinder.

You are getting very good results with your current system. If I were you, I would continue to use it, and add a second strobe, but I don't think that you would benefit dramatically from a new camera housing and ports. The "cost/benefit analysis" may not justify it. Only you will be able to honestly answer that question.

IMHO, new gear or new tech won't make a person a better photographer. What it will do, is to make it a bit easier to get the challenging shots. (But that is nothing more than an opinion, so take it with the proverbial grain of salt.)