Right now there are quite a few different chisel manufacturers out there making quality chisels - Robert Sorby, Two Cherries, LMI has thier own tools made by an excelent German foundry with High quality steel, Pfeil, etc etc etc ....
I have the complete LMI set and while its expensive, it holds an edge almost twice and long as my Pfeil set of chisels... I would reccomend them easily.... the tintul handles look spiff too!
Toddstock knows the most about hand tools around here,,,
He recommends that a well tuned up vintage Stanley plane, is every bit as good as a newer hierloom quality tool such as Lie Nielsen,
but I like the notion of shiny gleaming brass and steel beauties in my (eventually constructed) tool cabinet....
I like making my own tool karma so I went Lie Nielsen.... but I find it definitely takes longer to tool up when your not independantly wealthy,,,
Theres a way to easily identify a high quality tool usually - look at the price tag!
Cheers
Charlie