So basically the shp 9500 is like an upgraded Grado 80i?
Same type of harshness in the highs same kind of brightness?
My understanding of the Grado SR line, based on my own experience with an SR225i and on reading lots of impressions and looking at lots of measurements, is that Grados as a class have a very distinctive sound, and that in general, the further up the SR-xxx line you go, the brighter the overall sound. Tyll Hertsens in fact has said that the SR60 is his favorite of the range, on account that it's the least bright. However, they all have a prominent spike at around 2 kHz, most likely a resonance artifact from the small, perfectly round cups in which the drivers sit, which pushes the middle and upper harmonics of vocals and instruments forward. In my experience with the SR225i, this spike is wholly unlike the extra upper midrange energy on the HD 600 in that, on the Grado, it doesn't sound natural. It's an obvious coloration on top of everything played through the headphone.
This doesn't mean it's terrible--if you like the signature, it can be very enjoyable. On a few genres I really enjoyed it, and fans of the sound tend to be very vocal about it. But good all rounder a Grado is not, IMO--I gave up on mine because, then as now, I wanted one headphone to rule them all, and the Grado clearly wasn't it. In general, the midrange spike can be fatiguing, as can the treble, which I found bright and unrefined without modification. A few plies of toilet paper over the drivers improved the sound immensely, as is often the case with underdamped driver systems. It can't do anything for the midrange resonance, though, meaning you'll always have that signature, for better or worse.
My advice is if you disliked the SHP9500, unless you get an opportunity to try a Grado for yourself without obligation for an extended period (which, due to Grado's strict US distribution only policy, might be difficult for someone where you are), steer well clear--they're all going to be bright and splashy in the treble, to varying degrees of overall treble lift and with varying amounts of midbass boost (on the RS, GS and PS series) to balance it out.