Waterjet will be the most precise. The cut edge will be rough as the jet chatters or pulses as it cuts. You'll probably want to profile and polish the edges afterwards. Even if wood framed you'll have to grind the edge smoother more than likely. A shop that is sophisticated enough to have a waterjet will probably have other CNC equip that will do a beautiful job on profiling the edges too.

When I have to budget a commercial reception desk or vanity top quickly i'll usually figure $25lf for waterjet cutting, and $12.50lf each for straight cuts, profiling, and polished edges. Something small like you are doing is going to cost more as the programming time is the same to 1 as it is to do 100.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)