If its any help I've been told Kurushimi sounds like Gakupo (More specifically His Seke sounds like Gakupo's Native...tthats the most common one I get. Other than that, his Seduction sounds like Gakupo's whisper. *shrugs*)
As for a Miku sound a like I agree more of Teto being closest that I've heard. Like Flags are yer friend as are resamplers and tuning a bit.
Len, I agree that Reizo is a good match
I think Galvan Ize would make a good KAITO.
I do think just about any deeper voiced female Utau would fit the deeper voiced Female Vocaloids. One with a softer append would definitely fit Luka.
( I mean, we all can't record Chipmunks, just sayin)