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In terms of what features and size you go with, I think it depends on if you want to keep the PURE X around. If you're planning on it, then a product stack that looks like this makes sense:PURE: Either a UHP or a LP GPU and external PSU (so basically either an APU case or a mini S4M)PURE X: LP GPU and UHP/Flex ATXPURE XL: Full-height ITX GPU, SFX PSUAs long as the PURE X exists I don't think the extra volume to support both a UHP and a LP GPU simultaneously is worth it. If you're planning to simplify your lineup then yeah, consolidate the PURE and the PURE X. But otherwise giving folks more options in a similar size on the PURE Mk2 is the way to go.
In terms of what features and size you go with, I think it depends on if you want to keep the PURE X around. If you're planning on it, then a product stack that looks like this makes sense:
As long as the PURE X exists I don't think the extra volume to support both a UHP and a LP GPU simultaneously is worth it. If you're planning to simplify your lineup then yeah, consolidate the PURE and the PURE X. But otherwise giving folks more options in a similar size on the PURE Mk2 is the way to go.