TV? Accesories?

I will be getting a 360 next month (or maybe not until October), and I was wondering what are the neccasary accesories. I want to play 2-player, occasionally hook it up to my parents HDTV, and maybe play online. So what do I need? What is the cheapest controller that maintains good quality? What hook-ups do I need for HD and how do I know what to set the 360 on for that particular TV? Should I get one of those online cards and which one is the best value? etc.

Thx for any responses.

For online, you need to be able to run a ethernet cable from your modem to your 360, or buy and then hook it up wirelessly.

Get a plug n play (or play n charge, cant remember) kit to charge the controllers while you play.