I've got emulators in the forks, can't remember the brand, transformed the bike. Still not as good as modern stuff but massive difference to standard, especially when braking, doesn't dive like it did before. Cbr600 f3 forks fit if you want proper cartridge forks and don't mind a bit of messing about.
Standard fork springs seem ok for me, I'm about 12 stone.
I had hagon shocks on the back, the£200 ish ones. They were at least twice as good as standard. I've since changed them for bitubo adjustable ones, non piggyback. These are twice as good as the hagons.
Justin