Yes.
The R8's '808 kit' is definitely saucey.
I borrowed a buddies R-8 w/ cards & sampled the shit out of it for my 3000 a couple yrs back.
I still use some of those drums. The snares are murrrrrder.
The best (non-sampled) 808 kits I've used so far, that are not from a real TR-808, would be the R-8 & MachineDrum (both have there own unique sound though, they aren't identical to 808).
I hear the JoMox & Novation supposed to be right up there though, but never tried them.
Also check out Drumatic VE from e-phonic.com.
http://www.e-phonic.com/plugins/drumatic_ve.php
I haven't used it yet but its supposed to be good + free.