I know there are many factors that are taken into consideration in producing a good quality photo. However I've been bothered by this notion that lens too plays an important role. But how far is this from truth? I'm a beginner who owns an entry level Sony A300 camera with 2 lenses (18-70mm F3.5-5.6 lens kit & 55-200mm Telephoto lens kit). I've been snapping photos but somehow I could not get the quality desired. (I even applied other techniques possible) Is it the camera? Will it make any difference if I change the lenses?

I got to the point where I almost gave up photography...until I found out about EOS 60D...