I bought my 1 owner completely stock dealer maintained 95 GSX not too long ago. Here is a list of some things I did when I first got mine.
-Replaced timing belt and balance shaft belt (good thing I did because the balance shaft belt broke during the removal)
-Replaced valve cover gasket, half moon, spark plug gaskets (all of which were hard and needed replacement)
-Changed tranny fluids
-Checked brake pads and lines (rear pads needed replacing)
-Bled brake and clutch lines with new DOT3 fluid
-Flushed coolant
-Replaced spark plugs and wires (upgraded to ngk plugs magnecore wires)
Bear in mind that mine was due for its 90K service. All work but the belt replacements were done by myself, everything else is really easy. If I was in doubt, I replaced it. Preventative maintenance was my thought. Pick up a Repair Manual if you haven't yet. Not sure what you mean by the whole 9 yards, but if it included regular maintenance and inspections, then you should be good (hopefully the belts were recently changed). There's a bunch more you could inspect, but this should be good for starters. Hope this helps