Check the avatar(Ensoniq Mirage Rackmount). They go for $50-100 on eBay now and with a PC you can make backup disks to your hearts content(just buy 50 blank 720k disks from the seller 'supershooters' and go to
miragelives to download the backup utility and original disk images). It does give drums more 'smash' than the above mentioned machines which have more 'punch'.
Actually I just reread your initial post and realized you wanted a 'good' sounding sampler.....oops