Thats a good point Wezly.
Xion, if you used Petra'sTech "Gel-Stuff" Vibration Absorption Block, http://www.petrastechshop.com/pegviabbl.html
As its clear, it wouldn't looks to bad at all, however, if you cut it up and put a strip between the shelf/floor and L bracket.
That would also work out well and would be out of sight.
Not sure which model DDC pumps you have bought Xion.
But the newer DDC 3.25s (Koolance) don't have side brackets, instead they have two bolts that bolt into the pump from underneath the pumps base, nice and out of sight.