New to Vectra - problems

Hi

I purchased a 2007 1.9CDTi Vectra recently with good service history which last year had the timing belt, clutch, flywheel replaced @ 125k (currently done 129k)

The car drives smooth, clutch seems ok and gears change smooth but there is a noise when the gears are selected! Its not a grinding noise or a whine, more of a 'turning' sort of noise.

Is this the gearbox on its way out?

Thanks