Both MS & Sony are pretty vigilant about banning JB consoles in a heart beat. If you're going to go that route (and I don't blame you, anyone who doesn't in this country has money to spare) best to give up on the online aspect. I'm not sure how complicated the 360 procedure is nowadays, it used to be as easy as plugging in the dvd drive to a pc, but if it's anything like Sony's 3.56 protection, you will probably want someone else to do it for you.
Http://www.cextreme.com/ does repairs and "other services" for the PS3, it might be worth asking them about the 360. They're slow as hell but reliable from personal experience.