I haven't had good results with any Minwax product, especially their gel stain. I get poor penetration with it, it's just too thick. What you see after the first application is what you get. It might be better if it were thinned down with some linseed oil, but it's easier just to buy a better stain to begin with. Plus it seems to be awful sticky after application. Mine took about a week to dry to a point where I felt comfortable applying a finish.
Behr used to have a "Scandanavian Oil Stain" that was thin enough to penetrate well, and successive coats actually darkened the wood (what a concept!) I don't know what they are selling these days though.
For the topcoat: shellac is easy to work with and apply, but it isn't that rugged of a finish. I recommend some oil/varnish mix. Tung oil is what I use, and it has always worked very well for me. It's a little more work but is easy to apply. I would stay away from polyurethane just on principle. It's hard to touch up and it always tends to be too glossy for my taste.
Any oil-varnish finish can be freshened up with a new application, and its gloss level can be controlled with a steel wool burnishing job.