I'm curious about the vaporbase wick too. So far, all that I've used on my Penny is the 3.5mm silica from CoV and, for the past two days, bamboo wick from HDV. The 3.5 silica was a bit too thick, and no matter how much I torched it, I couldn't get rid of the initial silica taste. The silica flavor, however, did go away after about half a tank. I was told that removing a few strands from the 3.5 silica would make the fit better, as well as improve the wicking and flavor. The performance was definitely better after removing a few strands, but there was still a slight silica taste.
The bamboo wick that I currently have set up has been much better for me. It's a bit tougher to work with because it's fluffier. I had to use a 2mm nail to wrap the coil, but my initial feeling is that I'll definitely be sticking with this over silica. I also got some 100% organic cotton wick that I'll be testing out on my next rebuild, and from what I've read, most people like cotton better than bamboo. Just throwing those options out there for you to chew on since you're new to the world of silica RBAs. I just started my journey a week ago so I'm pretty much in the same boat.