There are lots of ways to regain the enthusiasm that got us upgrading all the time, that does not require spending a month's salary. Ask anyone whose work your like, how he does it, the last thing they might mention as factors in great results is the camera. Even great lenses are not as predictive of results as lighting, posing, position(sports, BIF, stage etc), post processing. Seek the enthusiasm, not the device, mentally coupling buying a new expensive item with passion has an expensive unneeded price tag.
