vinyl to mp3

Im thinking of getting those numark pdx cd turntables and downloading music from now on...cus no.1 , Im not at a good location to purchase vinyl and in the long run it makes more economical sense....really appreciate feedback....will mp3s suffer in quality?
are the numarks any good?
is this a good idea?

consider serato scratch live, probably cheaper in the long run and you''ll still ahve access to vinyl

plus the sound is just as good, not to mention the software is great. this way you can actually scratch your own breakbeats from mpc, or bass, etc just with a click and a drag.

i love ssl