It really depends on the woman. On some, larger fake boobs just look bad, on others they look good.
In general, I prefer natural, ranging in size from someone like Sasha Rose or Faye Runaway to your own or larger.
Some fakes just don't look right with the woman - for example Lupe Fuentes or Aletta Ocean (who just went too big), who looked better with smaller natural boobs, others look good - Miss Hybrid or Violet Erotica.