I can attest to how well overdriving the 2k sounds as well, especially if you lower the sample rate/bit depth before sampling hot into the inputs you get the grittiest fuxking sample ever. It is very temperamental though, in other words sampling a snare at 0db can sound great, but it can sound like total shit at 1db. The more high frequencies you have the more fussy sampling hot can be. For those intersted in using the 2k for this it is a must you have speakers/headphones that give you accurate high frequencies because it is such a fine line your walking before it just sounds like shit.
Basically ill goto the sample screen and start monitoring the sample input, slowly turning the volume up until the input level maxes out at 0db. At most I might have to redo the sample a tiny bit lower. The only sounds I wouldn't recommend over driving are hi hats and cymbals (obviously) and electric piano type sounds or pure tones because all you hear is the bass blowing out on top of the sample..
Don't know how much of this is common knowledge for sampling hot in general or specific to overdriving the classic itself, but I wanted to share my experience! Just another reason Im a big fan of the 2000 classic. I don't know anyone that owns one and dosnt have some sort of awkward cult affection for it

Edit: if people were interested I could do an A/B comparison and post the individual samples of like a 4 peice kit or something?