Ive got a 1.2 16v Billabong, for your money you get billabong dash inserts, different coloured seats and trim, billabong sill protectors, a leather gear knob and a sticker on the side that says billabong, oh and free metallic paint. I like it but you dont really get much extra for the money. The digi pack gives you the same stereo that ud get anyway, just with a six disc mulitchanger. The speakers that it comes with as standard are ok, Id pay for the cool pack getting aircon and an electric sunroof (which I wish id paid the extra for) and keep the rest of the money until you can afford a decent ice install.
If you do get the billabong pack, dont get the Citrus green colour, its disgusting and wont sell on as well when you want to get rid of it.