I have heard on some eliquid websites that it is good to let eliquid steep. What does it mean to let it steep and how would you let it steep?
Steeping is an aging process. Some of the more volatile and perfumey components of a juice evaporate off, and the components of the flavor are given an opportunity to mix better. I no longer steep, and I will get to that later.
Put an empty bowl in a pan with an inch or so of hot tap water in it. Take the lids and dripper lids off, and put the bottles in the bowl. Put the pan on the stove burner at the very lowest heat setting, and leave it for fifteen to thirty minutes. Turn off the heat, and leave it for four to five hours. Put the lids back on, and put the bottles in a dark place for one to two weeks, shaking once every day. With this process, a so-so juice can become a very good one, but a gross one will remain disgusting, IMHO.
I no longer do this because I DIY, very simple when no nic is involved. I further simplify by using only one or two flavors in each juice. Complex flavors should be steeped, but simple ones are OK without.
The other question, which you addressed to Eric: A dark juice does better with a top coil. The best clearos are those which have replaceable coils. If I wanted to buy a bunch of clearos and did not have many dark juices, then I would be buying the BCC. I use the DV CE5 for most of my favorite juices. I use another company's minis for juices on my secondary lineup, but, for the price, if I had it to do today, I would use the BCC.
I doubt that Eric would tell you which to buy-- he would only tell you the advantages and disadvantages of each.
As far as glass goes, I am seriously looking at a Davide. I have had very good luck with the more chemically active juices, except for the hot spices, so one should suffice.
Fortunately it is just a WANT thing instead of a NEED thing. 
