I make my own loops in soundforge or fruitloops..SOmetimes mixman dj and dance dj..
But ialways edit them in soundforge.
ITs heaps easy to use.
Ive checked out your progrmas..And they dont have the same easyness and options as soundforge.

I guess when your exporting them they export them at the default settings which is 16 kps mp3..Which is bad quality.
I would open the library find the wav right click select properties..Then id select the export setting and then test by pressing the test button..
Hope it helps dude