So lots of us have bought nice new or used lenses and cameras and so on, but has the investment been worth it?

[spudhead]

Ok so we have the what have you bought or sold section, and lots of us have bought new or used bodies and lenses etc and sold items as well. So the question is have the new buys been worth the investment in terms of improved image quality and ease of use, and secondly do you regret selling any items?