While I haven't heard these "Gold" darts before, I've used the regular ones many times and they are way too noisy for my liking, especially in a living room. Perhaps in a completely sealed and insulated cabinet with vibration pads it might be OK but otherwise too noisy. The other problem with them is the seals tend to fail which leads to bearing failure and that's a real noise.
On my new tank I broke down and bough an RD which was expensive but man am I ever glad I bought it. The noisiest thing in the room is the hard drive in my PVR box followed by the buzz from my halide bulbs (not ballasts). The pump is unbelievably quiet and worth every penny. I think if people could actually see how quiet these pumps are they would be a lot more popular, I will never go back.
I realise I probably opened a huge can of worms by mentioning the red dragon so I'll sum up by saying buy the gold dart and if that's too noisy save up and trade it in for an RD.
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