[The Greening]

I'm not sure if this is the best forum to place this, so if you know of a forum dedicated to sampling, redirect me.

I'm looking for a good sampler that can be used for

A.) programming drum patterns in home environment
B.) triggering live sequences or sound effects on stage
C.) sending midi information to a computer to control host software (like BFD, Guru, etc)
D.) is straightforward and intuitive in it's programming

So far, most people I've encountered talk up Roger Linn machines (MPC 60, MPC 3000). However, I see that the MPC 2000 is often much less expensive, and seemingly can produce the same sounds. What are the differences between the machines? Is transporting WAV files from a computer to any of these samplers easy, or is it necessary to convert to some proprietary format?

Are there any underdogs who don't have the legacy of the MPC, but are equal or surpass?

In general of all hardware samplers when acting as a MIDI controller, are the drum pads the only acting MIDI triggers, or do any of the knobs/sliders also transmit data (I'm doubting it, but maybe).

Thanks,
Will