If you're specifically looking for the girl Transformers then also consider looking at the Takara Tomy LG figures (although obviously they'll probably be a little more expensive than the Hasbro ones) - they are better looking than the Hasbro Generations figures according to my 11 year old Transformer collecting daughter (and I agree with her) and you can also get Nightbird, Slipstream and Black Arachnia to increase the girl-count.