Not particularly there dude, I already own all of those atties (bar the Veritas, as I got rid of the two that I had) with along with 28 other RDA's, so there is not any part of that post that suggests that at all. All three of the ones I have recommended can be used with single or dual coil builds and offer excellent flavour which is perfect for testing juices. Also, if the OP decides to plump for a clone of these stock is readily available and cheap. From the last year of pretty much solidly using just RDA's until recently I made my recommendation based on a combination of ease of build, deck size, flavour and long term satisfaction that the OP may get out of them. If you cannot rewick any of my recommendations quickly then you won't be able to rewick any RDA's quickly.
The QC on Derringer clones is very hit and miss and there is no way I would recommend one for a noob. The post holes are small and not ideal for a newbie.