I've done some searching for a better soldering iron than the one I've been using for the past 3 years, a WP25. A few days ago I watched a video on drag soldering, and realized that having a 30 year old iron (without even knowing the necessity of flux I might add) might not be ideal for such a method.
So far, it looks like I ought to go with the Atten 937B or the 938D -- does anyone have either of these irons? If so, please write a review/post a teardown.

Thanks.