My 2 cents: The Sequence Dart is very powerful and very quiet, but if you want to run it wide open make sure your overflows can handle the flow...it will give you well over 2000 gph even with several feet of head pressure. Also, all that flow will make the overflows a bit more noisy. For the skimmer I'd say a Deltec AP851 would be a good choice...kinda pricey but very powerful