d40? , well i went from a d40 to a d60, then went to the d90. I wouldnt have gon for the d90 if it wasnt a killer deal but then again it was, at 700$ brand new, was a killer deal to me and i wasnt really plannin on keepin it, mroe so a buy then sell for profit. [yes yes i do buy things and resell them for profits ] but once I started using it, the more i feel for it. it worked wonders on my 50mm 1.4d which actually doesnt autofocus on the d60[and does for the d90], and i must say 'my favorite lens outta the 3 so far'. so this definitely made it more convenient for me. my pictures were sharper than b4, due to the fact that i suck at manually focusing (>.<); also; around that time they came out w/ the 50mm 1.4g BUT it was like what 400-450$, so it was more like, spend the extra $2-300 on the new 50mm or new body?. and omgee yes, the iso? ooooo it works wonders, i cant even compare it to the d60; btw, ya read up on the new d500? couple hundred dollars cheaper then the d90; a tad bit similar to the d90.