From my research there are a million opinions and two million theories.... Ha you will soon find out.
My advice would be look at the skimmer based on where you live... I came to the conclusion that becketts were probably a little better than neddlewheels, but require more expensive pumps and alot more power.......
So if you live where power is cheap look at becketts, MRC etc..
If power and excess heat from big pumps is an issue for you then look at skimmers like euroreef, etc.
I spent months trying to figure out what skimmer to to with.
Good luck and hope maybe that helps. Somewhere on here there was a great thread by Anthony Calfo in the All Things Salty forums, but I cant seem to find it now.
Brandon