no loops because i dont waste my time on stereo samples. i never heard an instrument that produces different sounds for the left and the right ear (except for headphones). i take what i can use and make mono instruments for myself. sometimes i play SFZs to find out if there is something interesting in it, but i always play SF2s through VirtualMidiSynth (Coolsoft)
as far as i know every DAW can play SFZ files, i use an ancient version of Cakewalk and it can.
regards