I recently put a 1" Mazzei injector to replace the 3/4" one and now I am going to upgrade the pump from the little giant #4, I have a line on a Panworld 200 (1740 gph) or an Iwaki 100Rlt 2100 gph. The Panworld of course draws way less watts (280 max) compared to 380 for the Iwaki. Do I need the big Iwaki or do you think the Panworld is enough? I'm leaning to the Panworld but let me know what you think. 