That sundown definitely interests me...Where would I go to get that amp? I would like to see it and read some specs on it. As for the RF and the memphis..better I mean which out of the two is more efficient, and which has "cleaner" power...and which do you think has a more accurate power rating? I've heard that the RF actually puts out more power then the specs say. Its rated for 1000 @1ohm...but ive seen some birth sheets that have said 1300@1ohm