Hi to all of you who are kind enough to give your opinion.
I am looking for a pump or 2 smaller pumps to give between 11,000 to 12,440 gallons at a head height of 4-5 feet(over bakki showers in Australia). My pond will be using 4 inch pipes most of the way. I am looking for the most cost efficient and energy saving pumps that I can import in because in Australia we only have small range of pond pumps that are usually for smaller pumps. The pumps here are more for mining and agriculture where electricity is not a concern. There are literally no good high flo, low head pumps (0-18ft) that are very energy efficient. I have been looking on the web at several pumps but would like a hobbyist view.

1) Dolphin pumps superamp master 7500 USA 1/3hp motor, 380watts (230v), 5827 UK gallons @ 4ft, 56 frame, emron motor, not self priming, with leaf basket (380 US dollars wholesale price)

2) Dragon pumps 1/3hp, 437 watts, 5489 UK gallons @ 4ft, 56 frame, baldor motor, self priming up to 4 feet, large leaf basket (590 US retail)

3) Sequence primer 1/3hp, 376 watts, 4560 UK gallons @ 4ft, baldor motor, self priming with leaf basket (472 US dollars)

4) Wave 2 PUWV13 1/3 hp, 425.5 watts, 5320 UK gallons, baldor motor, not self priming, no leaf basket, (439 USD)

5) performance Pro artesian 1/3hp, 428 watts, 4772 UK gallons @ 13ft (minimum head), self priming up to 4 feet, with leaf basket, 570 usd

please let me know what you think of these pumps.