The DX7 is at least 2 steps above the F600. The DX5 is similar to the DX7 but it doesn't include the extension table, additional lighting or as many presser feet. I considered the DX7 for a short time along with the other two, and the local dealer does have its sister machine, the 2000QVP. I sure wish she had the F600. I think have managed to talk myself out of the DX7, as the F600 seems to be equipped with everything I need.