Reply by MJCD

I second HorizontalMike’s comments. You may choose to buy one before the other (Fiscal Cliff allowing); but in the end you will need both. The machines may overlap in some marginal way; though, to me they are mutually exclusive and fully-complementary.

New TS blades can come close to providing a near-finished edge; however, for precisely fine-tuning a board width, for 1st-face milling of a rough board, and removing a TS burn mark the jointer is the go-to machine. Personally, I would bypass the 6” variety (though, I know many woodworkers are strong advocates of this size), and get an 8” if the finances can handle it.
MJCD

-- Lead By Example; Make a Difference