The AGA-T Plus. I recommend making the following modifications to it though, buy the smallest stainless washers you can find at the local hardware store. They will cost about 6 cents each. Take a bic pen, the kind that retracts. Pull it apart and take the spring out. Throw the pen away and cut about a third of the spring off. Take all of the nuts off of the center positive post. screw on of the large nuts down as far as it will go. Put the 1/3 spring on the center post and work the bottom of it over the nut. Put two washers on and top the whole thing off with another large nut.
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This will give you a hot spot free, quick release positive attachment point. It fixed 99.9% of all the problems I was having with the AGA-T.
The best looking drip tip to get for it is the "stainless steel hourglass" (in my opinion). IBTanked sells high quality Pyrex replacement glass in two different thicknesses for these too. Which is another big plus in it's favor.