I also like to pick my whole team early, but I usually do things a little different.  This is my current lineup for SS.  Since I don't remember all the names of the fully evolved forms, I'm just going to say them as they are now.

1.Fire-Quilava
2.Water-Poliwhirl
3.Electric-Electabuzz
4.Physcic-Kadabra
5.Grass-Weepinbell
6.Dragon-Dratini(when I effin get far enough in the pokewalker)

I feel like this is a real strong team that can be effective against most types.

Will I be able to play then once the beta drops?