Although I tell people to never buy a camera that's more than 2-2.5 years "old" (since first ship date), I rarely see a benefit to upgrade by just one generation. There's probably a lens in a ROUGHLY similar price point you could get that'd make a lot more difference for your shooting than a one-gen body upgrade. Now, if you were ready to transition from one body to two, I highly recommend that, and I'd probably suggest going only one generation up.