I am looking to move in house assembly of prototypes under our own roof. Our boards are typically very small, but it is nice to be able to do as many at the same time as possible. We need to do lead free soldering. I have been evaluating different options of ovens in the 5k price range. Much of the information out there seems dated at this point and I am having difficulty understanding the best model for us. Also, would Nitrogen be worth the added complexity? I can't seem to find an honest review comparing the reliability of these machines to each other. Here are some of the models I have been looking at:
LPKF ProtoFlow S Reflow Oven
I also want to know what the advantage of those ovens would be over this one:
Any information would be much appreciated!