noxical
7
Note that with the A4 you can also make some nice percussion sounds (check the DrumA sound sets beautifully made by someone from the forum).
If you have a MD UW+ version you can sample the A4 and send the drums too you MD sample bank. This will keep your A4 tracks free A4 for leads, bass etc. and polyphonic 
I use a mixer with AUX send to my MD for sampling the A4.
Then again I route the MD into the A4 for adding some reverb, etc.