In this website you will find the best overview of thermal baths in budapest: BathsBudapest.com
To have an overview of the location of the thermal baths, see the map below:
Gellért, Rudas, Király, Lukács can all be easily reached from Bölcső7 by tram 41.
Among the baths in the map Dandár is the only one I would not recommend, because it does not have the flare the others do have.
Regarding Király I also need to add, that it has not been renovated for a long time. It is actually one of my personal favourites, because I do like Eastern-European flare, but I know some people would find it run-down. If you like clean and tidy, you might rather want to chose Gellért, Rudas or Széchenyi.
