Cruisin at 2500 rpm's is absolutely not harmfull for the engine, neither the clutch will suffer, but be prepared to shift down, when going uphill, or if you are passing a car, semi, or a fast cyclist....
Spyder is the happiest round the 3500 to 5500 rpm mark...for shifting points, Me when in the city, I normally drive in 3rd or 4th gear, 45 to 65 km'h, when on highway cruiscontrol and a steady 100 km'h, the spyder runs at 3000 rpm.
Just don't hit the throttle in a too low gear or rpm, that is what causes damage in the long run, better to shift down, and hit the gas... The spyder will reward you every time, with a big grin on your face