What phone/plan do I want if I want unlimited wifi calling?

I asked this in another thread, but it was related to the Optimus.
I dont yet have a cell phone. But I want to scrap my landline entirely and go cell. I talk a LOT on the phone at home, to family. I have been looking at the Virgin Mobile phones and plans. I want the cheapest way to talk unlimited at home (using wi-fi through my verizon dsl?) on the cell phone. And also to use it for checking email and such.
Can I purchase a cheap plan that would allow me some minutes while out and about, but is there a way to go through my dsl/wi-fi and get unlimitd talk and maybe surfing while at home?