Thanks for the input guys, I'm trusting Woody on this one!
Follow up question, am I mad considering putting in second hand suspension parts?
These I've been offered have about 30K miles on them, rubber all looks good in the photos, and the price for all 4 as complete set still assembled with springs, mounts etc as they came out of the donor is approx $500 US.
The other option I'm considering is to buy Steved0x's (who's been amazingly patient with my dithering around by the way, thanks!) brand new Koni FSD's, which are also a great price, but when you add shipping half-way around the world come in at around twice the above price, plus I'd probably still need to get various new top bits etc.
Considering mine are 20 year old 65k mile originals, anything's got to be better... right? Thoughts?