Stick a picture of the frame, bike up.
But cheap Marzocchi Bomber, should last and do the job. (97/98/99)
Pretty much it for 'robust', unless you got to later 98*/99 Rockshox Judy, not sure on Answer Manitou of that time and 'robust'.
If you need to go earlier, then the air/oil forks are the most robust. So Rockshox MAG21, Marzocchi XC500/600/700/DH series. But you'll need to run/buy Long Travel version of these.
Headset is whatever you want, threaded for a threaded version, Ahead for one of them. Depends which steerer style you go for.
Go pretty, go cheap, go really well, go expensive.. Up to you.
I'd stay away from 95/6/7 Rockshox Judy*, any Indy
I'd stay away fro Pace/Manitou and any other Elastomer based setup that relies on just grease to lubricate the bushings and not a nice bath of oil like the one I mention before.
*The star for the 1998 is they altered the cartridge and lubrication method on these and they are more robust, the cartridges done really bugger up and the bushed don't go bye bye at a bit of water or blown damper. But the 99 Hydrocoil are that much more robust.