I have 4 Routers, a PC-690 set, a PC-890 set, a Triton, and a Dewalt laminate trimmer, also with a plunge base. I find them all useful. The 890 spends most of its time in the fixed base in the router table, as by drilling two holes in your mounting plate, you can adjust it above the table. The Triton I got with the expectation of building a Paulk Workbench and using it there, but so far, the bench is not yet assembled, so it is just hanging out. The Dewalt I purchased to do sign routing with a Rockler template set, and it works great for that. Of all of them, I still like my old Porter-Cable 690, which has both a fixed, plunge, and D-handle base, which is the one I use the most for edge routing and such. Whoever said you would want two, they are right. Its very handy to have one set up with a round-over and the other set up with a spiral bit for routing grooves and dados.
Doc
As Cort would say: Fools are the only folk on the earth who can absolutely count on getting what they deserve.