Controller Question: 4 Decks in Traktor?

[manlike]

I have decide to take the plunge into the world of digital djing. I have decided on Traktor for software ( the 4 decks cinched the deal) and would def like to incorporate a controller...
Most controllers seem built for two channels, is there a (non-cumbersome) way of controlling 4 decks with one of these?
Sorry, If this was covered, did a search on "controllers" and didn't really see this covered.
Thanks

[manlike]

For a $100 and some this looks like a great place to start
http://createdigitalmusic.com/2006/10/16/m-audio-releases-x-session-pro-dj-controller-129/#more-1677

Although this looks like it might last a bit longer
http://createdigitalmusic.com/2006/08/16/faderfox-controllers-for-live-djing-us-distribution-upcoming-models/#more-1573


btw are the jog wheels all that necessary for a non-scratching dj?

[Rotter3*]

heck this;-

http://www.beatchemistry.net/wiki/tiki-index.php?page=Controllers