Here's more details.
1] Basic spellcasting covers the spells, no problem.
2] the Sorcer idea is wild magic, they create effects, not pick from a list of spells. That's the key, it's meant to be like the Will and the Word from the Belgariad.
3] Channeling isn't to get spells, but powers. The one thing that drives me NUTS in D&D is that Divine and Arcane magic are just two lists of the same damn thing, spells. I want something special, something more.
I'll look at some of your suggestions and see if any hit the spot!
Cheers!