Im not really sure, i cant use loops in good conscience. make your own, really. if its a pain, or youre just lazy, chop up some funk breaks for a nice groove, and layer some kick/snare on top of it.
loops will hinder your progression. Lets say you find 2 nice loops in a pack of 20. . . . thats 1 or 2 tracks.. . . .then what? youre on the hunt again, looking for solid drum loops that bash. all that time looking for loops could be better spent learning to layer and create your own grooves.