Don't spend big bucks on the Jha set unless you're really in to poo.
Just get the RVF triples straightened and fit an NSR shaft into the triples. hey presto.
We've done numerous conversions for RVF, RS, ZXR, TZR and also RGV triples and forks to fit in the NSR chassis. RGV's are the most awkward, but it's only really a shaft change and a steering stopper reposition.
RS front works the best of course, and will also get you the most poser points. RVF works about as well as stock in my opinion, but obviously looks very trick. I've got ZXR250 on my 300, they're pretty good, but don't compare to the RS on a track-attack. Paul's RGV forks are....Hmmmmm....ok, but we need to have a re-think on the internals. Getting his CBR929 brakes to work with an RS front wheel, and VTR disks was a bit of a challenge, but now the braking performance is too much for the fork set-up.