they all have distortion ...
if you divide the LF focal length by around 3-ish you get the 35mm equivalent ..
the problem with using ultra wide lenses ( shorter than 90mm ) is that often times
they require a center filter to even out the light cast on the film so it doesn't vignette ...
and often times these center filters cost an arm and leg ... ( not to mention they eat 1-2 stops of light )
as for "good" lenses, you might look for schneider super angulons they have big coverage ..
but rodenstock and fuji and ilex and wollensak and kodak are all OK lenses too
but it is good to know the specifics ( image circle &c ) so you don't get a 2x3 lens by mistake ..