Wanted 2 knno from others about which end is more improtant 2 have(if u have 2 have just the 1)?

We are a hip hop production team/company. We make beats using mostly samples and keyboard. So we dont do any live recording. No special outboard gear(yet). We track using our beat machines(MPC/Triton) patched directly 2 our Digi 002. Thats it.

We do have a Benchmark DAC-1, just want 2 kno which end is more important 2 hear whats goin on... before and after goin in to our computer.

And do u think we need 2 have an A/D converter?