use them all, godaddy BO's do not have a better chance on domains registered there. Pool and snap have more resources.
Two points regarding Godaddy:
1) The only backorder success I've had with them was for a .us domain.
2) I believe the possibility exists that a Godaddy employee or VP might scoop up good dropped domains before they even reach backorder status. After all, history has proven that at least one Godaddy employee and/or VP bid at TDNAM auction(s) against customers like you and I. Yes, it's true. After the fact, Godaddy changed their policy (whoop-dee-doo)
regarding employees and/or Vice Presidents bidding against customers like you and I at TDNAM auctions, but only after the scandal became public knowledge.
I never heard nor read that Godaddy employees and/or VPs were prohibited from scooping up dropped domains even if a Godaddy "backorder" for that domain was previously purchased by a sucker like you and I.
The Godaddy employee that bid against you and I at TDNAM auction(s) is Adam Dicker, owner of dnforum.com. How about that! We pay this guy to join his domainer forum, and he bids against us from the "inside" at Godaddy for decent name(s) like spyware.us.
This post will probably be banned, in true Dicker fashion. The truth hurts.