I'd use a good quality foam insulation on the pipes rather than trying to wrap fiberglass - less chance of gaps and fiberglass is a great air filter, but not the greatest insulation if there's any air movement. I have a RedyTemp recirc system. I put it under the vanity in the upstairs bathroom, and since it is the furthest away from the WH, everything else gets warm quicker, too. Not all houses are setup where that would work. Since you only care about that one sink, this would work for you and is about the easiest thing to install around (although it is not the least expensive). Mine's now about 8-years old and going strong. You could install the thing in about 10-minutes with no cutting of pipes or soldering anything IF you have a free outlet under the sink (this is fairly common if you have a garbage disposal or a DW nearby). If you do not have a dedicated return line for the recirc, then any system you install will need a thermostatic cross-over at the fixture. The RedyTemp's is inside the box with the controls and pump. As a result of having it all there, it will take up more space under the sink, and that may be an issue. The cross-over for the other units is smaller, but then you need to plumb it in back at the WH and supply it with power there. Also makes turning it on/off harder. The RedyTemp, being right there under the sink would be easier to turn on/off when desired. ANy of them will work. This one's the easiest to install. Disconnect the supply tubes from the shutoffs. Move them to the outlet of the RedyTemp, install a new set of supply hoses from the shutoffs to the inlet of the RedyTemp, plug it in and you're done. The way the thing gets controlled, there is a receptacle on the front of the box, fed from the line cord. Then a short plug. IF you just plug that in, it is on all of the time. If you plug a timer or some remote control box into the receptacle, then plug the short power cord into it, then whatever controller you chose would power the pump. If you want to rewire, you could add a timer that controlled the receptacle the thing is plugged into - something like a bathroom fan timer would work. Hit it for say 5-minutes, and the thing would run for that time then shut off (well, it actually shuts itself off after it gets hot at the fixture).