The EK tops with the 1/2-inch inlet/outlet work best for the DDC 350/355 series of pumps. Martin210 has shown this in the pump reviews and performance charts. Both flow and noise are rated.
As for the bay RES with pump combos, it really depends on the case you have. Some cases are not prone to pump vibration while others are extremely. To test your compute case, put your cell phone on vibrate and lay it on the drive cage. Call the cell phone and notice how well it will resonate in your case.
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