what to choose....?
 

at the moment i have focal polyglass 6.5 cpomponents for the front and 6.5 coaxials for the rear. the fronts are run off an alpine v12 amp(cant remember exactly what size) and rears off the alpine head unit. i'm considering buy one or two(depending on which of the following ways below, to go) more alpine amps from a friend, but in order to make my desicion there, i am wondering firstly what to have them run. i am sticking with the set-up i have plus these possibilities:-

1. focal 11" sub
2. focal 6x9's
3. both of the above

now they will be going into a yaris, which is why i'm considering it all(less space and therefore better sounds), i am pondering what it is i'm looking for exactly. i wish to build an ultra strong parcel shelf to host these puppys but at the moment, not sure whther it would even be able to stand up to the movements of the speakers let alone the weight. really stuck here, so if anyone can help or theres more stuff to be considered, let me know. thanks:)