I started out using the Behringher DDM4000 with ableton, worked really well but limited.
Mixer overall was great for the price. But sold it.
Then i jammed on a vestax typhoon running traktor, wasnt happy wit the faders but saying that the platters worked very well. Never had any problems but only a basic controller. sold it. I really should of went the top range model.
Pioneer DJM350 running ableton, flawless.? sold it as new products where released. Went for the flexability with this 1.
Then the DDJ T1 and the S4 come on the market, i went over these two machines 6 times before i decided and went with the T1. Very happy with the purchase. Especially with the traktor upgrades.
Since then S2 has been released. worth checking out. Also i see this hit FB today. check it out. Both i think are less exspensive than the ones above. http://www.facebook.com/photo.php?fbid=10150357042930802&set=a.10150280308805802.380439.211281950801&type=1&ref=nf
Another machine worth checking is the american audio controller and novation twitch.