I would add the KBtalking Pure (looks just like the poker, but its ISO layout), but I don't think it has shipped yet. When you consider the HHKB, also remember the JIS version. Sure, its got the tiny space bar and the kana modifiers that you'll never use, but it does have the true arrow cluster. Just something to think about it.
Other than that, you would have to jump to tenkeyless for more selection. There just isn't that much available in this form factor. I know you said that you don't want a true F-row, but you should also be aware of the non-backlit TG3. That would be a direct alternative to the noppoo, but as you stated, you are not looking for that.
EDIT: I wish there was an ALPS version of the 40% form-factor.