sampling quality question

(sorry for the double post)

Might be very silly questions but I'm still learning... so bare with me...

I'm fully aware I need a pre-amp between my turntables & MPC in order to sample, could my SP303 do the trick instead of a dj mixer?

I'm currently using a portable NUMARK as a turntable, does the quality of my final sample really depends on the quality of the turntable/stylus? Coz when I'm listening to the source sound with headphones it sounds wicked but after going through sampler then MPC it seems I loose quality...

youll need a mixer or a phono preamp, your 303 wont work unless it has its own phono preamp built in, which i doubt.