New galleries, affordable rents and freedom to experiment offer west coast creative types an alternative base to New YorkThe 32-metre-long escalator tube isnt finished yet and the museums intricate outer shell is still being assembled, but when Joanne Heyler walks out on to the top floor of The Broad, a contemporary art museum set to open in downtown Los Angeles next year, she cant resist smiling.It never fails to take my breath away, said Heyler, The Broads founding director.