I've had the D600 since last October and I haven't had dust issues. Going all the way back to my first SLR, the FE, I always changed lenses quickly and shielded my gear as best I could. I avoid changing lenses in stiff winds, if possible, and clean my lenses with at least a blower brush frequently enough to avoid dust contamination that way. I'm old-school when it comes to gear care! I'm also not a full-time pro, and I can see where two bodies would be a help there. I don't see the D600 as being more susceptible to dust than other bodies, but I just ordered a 70-400 f 4.0 VR that has an issue with the seal...so I guess I'll just be more diligent! Thanks for the read, helpful.