I have the Igo-W. With no airflow adjustment I have drilled the air holes out just a small amount. I keep a single coil on it and use it to sample juices. Just a quick wick swap and I'm good to go.
I also have a Trident and a TOBH, both clones. I do not like the Trident much but use the TOBH quite a bit. I like the way the airflow control is set up but some complain about it possibly interfering with placing the the coils in perfect alignment with the air holes. The TOBH is my favorite.
I'm really tempted to try that Magma. A deep juice well, adjustable air flow with the holes directly below the coils. Supposedly leaking can be an issue with them.