Good value but not the best performer. Fuzion 2 or Apogee GTX are both better for hardcore performance, CPU temp wise.
From what I understand though, the Delta V3 has great flow & pressure drop characteristics making it a great choice for low powered (quieter) pumps, or loops with lots of blocks (vga, chipset, etc).
To be honest, I'd go with the Delta V3 personally if I were to go WC right now though.