Choosing a chip

[Cyber Akuma]

I read the FAQ but it only told me the basics, it didnt tell me what chip does what or which is the best. It said to ask around.

First of all, I know the no-solder modchips for the PS2 are terrible, but how are the no-solder modchips for the Xbox?

Are there any no-solder modchips that let you turn them off so you can play on Live without getting banned?

Also, can any no-solder chips let you do all that sutff I have been hearing about like watch any region dvds, divx movies, mp3s, copy games to harddrive, play emulators, and use action rpelay-like codes?

If so, can you give the names of those chips and a link to sites that carry them? (And are known not to rip people off)

Also, whats the largest size and speed harddrive an xbox can have installed in it?

Thanks