Just a couple of things that stood out...how do you see any third party involved if you're sending BTC from your Core to theirs? It doesn't go anywhere other than the tx network itself. Even if you're paying for something online using Bitpay or that other new(er) service (read as with Newegg, Hostwinds, etc.) they're only providing the exchange service to the seller, not you (you're not paying a premium yourself to use the service).

Seems the nexus of this is where you store your coin...which subject accounts for at least a couple of hundred pages on this board... ...which is about the only place a "third party" comes in. Some of us whom have been around since the white paper (and before Mt. Gox) have pretty strong opinions in that area. Reader's Digest version...your own Core on your own computer is the safest, IMHO.

Mine on.