we've been byuying teh Vietnamese River Cobbler that Tesco sell. Just dust in seasoned flour and fry for a couple of minutes and its lovely. delicate flesh with a nice haddock-esque taste. Never had a bone in it either.
Its also dead cheap at ~£2.50 a lb.
I've also used it in a Thai fish curry with some mussels, king prawns spinach and peppers and it was delicious.