I don't know the most recent models, but I will share the old UW photo saying - "the camera is an accessory for the housing".
There are SO many excellent cameras out there, it's hard to imagine that you would be restricted to one model. Since you seem to be able to consider a system in a Nauticam housing financially, I would recommend that you go with that.
I used to shoot with an Ikelite housing many years ago and I also had some issues with it. Have been shooting Nauticam for about 10 years, and it's an awesome product. Built like a tank, great ergonomics, etc... Maybe the new Ikelites are better, but if you have had a chance to handle both and prefer the Nauticam, I say go for it.
There are SO many excellent cameras out there, it's hard to imagine that you would be restricted to one model. Since you seem to be able to consider a system in a Nauticam housing financially, I would recommend that you go with that.
I used to shoot with an Ikelite housing many years ago and I also had some issues with it. Have been shooting Nauticam for about 10 years, and it's an awesome product. Built like a tank, great ergonomics, etc... Maybe the new Ikelites are better, but if you have had a chance to handle both and prefer the Nauticam, I say go for it.