I have done the mirror finish a few times using Mirotone 2-pac Poly and wouldn't attempt it with anything else as its the only finish that will successfully hold the polished surface over the years. The coffee table below was done around 2.5 years ago and pretty much still looks as good as the day I finished it. Its a lot of work though with filling the grain(many coats and rubbing back) and final compounding and polishing.
Just my opinion but I wouldn't bother trying to get a high sheen/gloss with Danish oil or Organoil as it would be unlikely to last anyway. Standard finish for me now is 3 coats of DO and if I want some extra gloss, a few coats of Minwax wipe on poly.
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