The 106 is a imaging scope and perfect for large format cameras like what you have, I'm not convinced with the WO132 even though I was also looking at this scope as well.
You will also have to get a Focal reducer and the field flatner adding $1000 to the cost, you wont need any of these for the Tak 106.
Tak has the better resale value another positive point.
WO132 is good value for the aperture.
Tak will provide sharper images due to it's better lense's.
WO132 are available now where there could be along wait for the Tak.
Your call.
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