For what you'd spend on a new Hardrock and less than you'd spend on a new Rockhopper: Real quick look at Craigs, so I'm sure I missed stuff.
'09 Jamis Dakota Comp:
http://sacramento.craigslist.org/bik/1451719243.html
RS Recon, Shimano hydros, Deore-LX-XT mix. Looks like a 19", might be big, you'd have to try it out.
'08 Fetish Discipline:
http://sacramento.craigslist.org/bik/1449733338.html
You'd definitely want more information on this one before you jumped, but it looks kind of interesting.
'06 Specializied Rockhopper Pro:
http://sacramento.craigslist.org/bik/1448349827.html
RS Recon, BB5's, Deore with an upgraded XTR RD. Big bike though, can't tell if it's a 19" or 21" or what, so again, it might be too big.