I got the XP3. I love it so far. I'm using the powerjet setting. The only thing is, I wish the XP3 came with extension tube so the jet can be set lower in the tank instead of high up. Even with the longer extension tube, it sits pretty high up. I actually used the other elbow tube and made my own design, then target the spray towards bottom at 45 degree angle. I think I have to move my pleco caves towards that direction.
Overall, I like it. Very quiet... I'm used to the noisy HOB splashes so this is very different for me.