[Sorry - duplicate
] -- Forgiven.
-- merged --
I would not categorize the Sony EV-C100 Hi8 VCR as a pro-class editing deck. It lacks TBC, and time code support, and many other features found in the higher end Hi8 VCRs. Also, it is prone to aging issues that degrade operation/image. I know because I have one and am waiting to find time to try repair it.
I suspect the EV-C200 is only marginally more capable since it has RF I/O. The Sony EV-S7000 is a nice editing Hi8 VCR, but also appears to suffer aging issues that effect quality of the output image. Be sure to test any before you buy, or deal with a very reputable source.
Many folks use the higher end Digital8 camcorders for transfer of Hi8 and 8mm tapes. I've found the Digital8 Walkman (e.g., GV-D200) to work well also, but it generally they run at a higher price point then the D8 camcorders.