I'm assuming you are on a tight budget (like me) - I have the D5000 too. My lenses are the 18-105VR, 70-300VR and 50 f1.4. I feel I have adequate glass for my useage and my budget - if I didn't have the tight budget I would have wider/faster lenses instead, but with those lenses I can be getting good results and learning lots about taking images and post processing.
It is crazy that you haven't made a decision yet, just do it and get on with enjoying life. With the ability to correct lenses in post processing now, life got simpler.