Advice--DJ controller/software for playing digital samples?

[cabletone]

I like to play records over beats that i've made, listening for samples, then when I find one quickly back-cueing, maybe adjusting the pitch, and playing it over, sampling into live.

I'd like to be able to do this with wavs and some kind of dj controller. I guess I would send traktor into a track in live.

Can you recommend a controller for this (cheap and small is good)?

I have an ipad so maybe there is an app for this too?

[102455]

The Numark DJ2GO controller is small, cheap and functional....