Hey, Nostril, I'm jumping in a bit late, but just wanted to say that I really this set is great! I've got a very similar thing going, but with Cyrillic labeling.
One point I wanted to bring up, it doesn't seem like anyone has mentioned the fact that SP does not offer dyesub on SA keycaps, not sure why. (Note on the
spec sheet, only "two shot" and pad printing are offered.) Double-shot is an option, and it opens up the color possibilities, but SP's cost to strike a new brass legend plate is $45 per legend, which would make the up-front cost very high, although it would drop sharply as quantities rise, basically what we're seeing now with Modern Selectric.
tl;dr, if you're going with dyesub, SA is out.
To me, one of the best things about DSA is that the caps can be swapped out any way you like. I'm typing this on a Pok3r with DSA Dolch, where I have the numpad kit installed as a mono-legend number row, numpad + for my backspace key, etc. Previously, I've used the nav keys to map out the Fn layer.
On a set like this one, where the legends purely exist for novelty, there is very little reason to cap-swap, so a sculpted profile makes more sense to me. But with SA not an option, that only leaves DCS, but I hear complaints about the thickness.
Sorry to be raising problems without solutions!