I always replace rear shocks with Nitron units. Makes a huge difference but like any handling mods once you start you have to do everything.
Shock shows up forks, forks show up brakes, brakes show up tyres and so it goes until eventually the new package shows up the rider.
So you end up getting some training at superbike school or the like and going on track days.
The end result is just like any other addict, you end up spending all your money on it and all you can think about is your next fix, if yo don't eat so much this month you could buy that slipper clutch you've had your eye on.
My advice would be to replace the shock (with a nitron) then get some professional help (pole dancer maybe) before it takes over your life.
Don't become an ADRENALIN JUNKIE
I know what you mean Celtic.
I fitted a Nitron R1 to my 03 Reg FZS600 over last winter along with front fork cartridge emulators, I spent a lot of time researching and talking with a certain guy on here about the front end before deciding on a pattern for drilling out/ overcoming the damping effect of the damper rods. Then fitted Ohlins Linear Springs.
I played with the oil setting along with the viscosity (Fine tuning) really happy with the bikes suspension but fitted new Batlax boots and decided that I was really pleased with the front brakes but decided that I needed to do something about the rear.
But then thankfully came to my senses, why? I hardly ever touch the back brake anyway except when turning at very slow speeds/ slow manoeuvres. But your right it can become an obsession, and an obsession that takes some feeding, when I think about it I spent half of what the bike is worth upgrading the suspension with out the cost of new boots back and front.
To be honest the original setup was boingy on the back and vague and harsh on the front, but for normal riding it was passable I guess as long as you did not want to go scratching.