[Drisump]

The word "cabinets" cover a lot of ground, my assumption that you mentioning "Baltic" birch" is that you will be making the cases out of ply and using solid wood for trim and possibly door frames (?). For a typical cabinet, say, "Shaker" style there are not many requirements for a router/shaper at all....a good dado set will cover most everything. Cabinets with shaped custom mouldings will require router table or shaper. A drum sander simplifies the flattening process if you have joined two or more solid boards but for most projects it's nice to have, but not required. For me a planer, table saw with dado set and 80 tooth ABT blade, sliding chop saw (with good quality finishing blade), jointer, random orbital sander, pad sander, biscuit joiner, lots of clamps of varying size and a shelf pin drilling jig (used with cordless hand drill) will give you a very good basic start. I have built many custom cabinets for clients and 80% of them only require these. The jointer is not really required for face frames but it's very useful around, say, frame and panel doors where the shape of the wood HAS to be straight and flat. Anyway, good luck on your project(S).
edit: forgot to mention compressor, brad nailer, and a narrow crown stapler (for non visible areas).