there are many.
the Sound Devices 722 will write to a harddrive and/or CF cards. (or the 744 for four channels)
There's the Marantz PMD-660 for just 16 bit, or the PMD-671 for up to 24/96 (both to CF cards, and both can be modded to oade)
There's also the Tascam HD-P2. very similar to the Marantz 671. records to CF cards
the edirol R4 records up to four channels to harddrive
the ediroal R09 records to SD cards
The M-Audio MicroTrack records to CF cards up to 24/96
look around on the board, there is a ton of discussion about all of these recorders. which one is "best" will largely depend on your needs and your budget.