which lens are you eyeing?
maybe you can share...
then ask if its better to get another lens of its equilvanet (maybe more expensive than what you are eyeying now)...
rather than change body...
cos buying better lens is better than buying a old school AF-D on a new DSLR...
that is how i feels...
Some of them "old school" lenses are the best ever made.
Just wait till your first SWM failure. ;P