I may get a Curio and if so a black. I agree about the difference between 7x21 and 8x25.
And I reason that 7x21 is a true pocket glass and as a good next step is Zeiss SFL 8x30, which is slightly larger and with even better hold comfort than CL 8x25. Still so compact and light weight that it it feels ok to carry around. AND: I prefer single hinge design.
I now have a CL 7x21 and a NL 10x32. Pure luxury, I know, but I am missing something between those sizes. The NL 10x32 is still quite large/heavy for a 32mm. The 7x21 is a very nice pocket bin, but not comfortable enough to really enjoy the view (for me). So now I am leaning towards a 8x25 or 8x30. My wallet (and because of that my wife as well) would prefer a 8x25. The difference with the 7x21 might be too small to justify it. A lightweight 8x30 such as the CL or the SFL would be more comfortable, but the difference with the NL 10x32 in size isn't big either. A first world dilemma.
I understand why you prefer single hinge. I might reconsider the VP 8x25 because of that and the larger FOV.