Retro gaming question

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I am curious which of the following combinations might be the most successful on an X-Box? My X-Box is already mod-chipped. I'm trying to find some way to use an oldschool "vintage" type gamepad on the Xbox that will be usable with emulators on the X-Box itself.

1.) USB Adapter for Xbox™ (female)

http://www.lik-sang.com/info.php?category=...oducts_id=2154&

combined with

USB Nintendo NES Controller

http://www.sealiecomputing.com/retrozone

2.) Dreambox Converter (Boom)

http://www.lik-sang.com/info.php?category=...oducts_id=1860&

combined with

PS2 RetroCon Control Pad

http://www.madcatz.com/Default.asp?Page=64...PS2_Controllers

3.) Magic Box (Third Party)

http://www.lik-sang.com/info.php?category=...oducts_id=1892&

combined with

SuperPad8 for Saturn (InterAct)

http://www.lik-sang.com/info.php?category=...oducts_id=3134&

Thanks in advance for any feedback anyone is willing to give on this.