I would purchase it in a heartbeat (despite its humongous pricetag) if it had dead keys. I live in the US, but speak other languages as well -- to put accents on certain letters, I need to use dead keys.
I've gotten around this by enforcing that kind of thing in software by using the US-International layout.
I speak English and German, so while I can transliterate ä, ö, ü, and ß, I don't particularly want to. Instead, I just type AltGr+q, AltGr+p, AltGr+y, and AltGr+s. There are dead keys for other diacritics.