Dovetail Jig

I've been researching dovetail jigs since I'm interested in joinery. What model jig would the group recommend? I've seen a lot of discussion on the web about the Leigh D24 (I think?) jig. How does this compare with the Porter Cable 24" Omnijig? Does anyone have any experience with the Porter Cable model? What about any experience with the Leigh model? Can anyone provide some information/advice on this topic?
Is it really a good idea to spend that much money to make dovetail joints? One of my projects in the future, 1 to 2 years away, is to redo my kitchen and make all of the cabinets and drawers myself.
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