I had been wondering about some of these same things myself -- thanks for asking so I could browse all of these great answers!
For anyone following this thread: I've been an ecig vaper for more than a year I guess now but just recently decided to upgrade my set -up. I had been using the cheap re-chargeable ecigs that are readily available at gas stations and that has worked ok for me because I will mostly use it when going out, to try an avoid smoking analogs when I'm with friends who smoke them. For the last several months I have been
vaping a lot more at home as well, and that is why I decided to upgrade. I ended up settling on an eGo 510-T set-up because I wanted something with an analog look (for not being so conspicuous in public) and something that could be used with a PCC, so it seemed like the best choice for the price. Also, I liked the variety of options I would have for attachments and upgrading later with the 510 threading. At some point, I do want to invest in an APV for home use and I was thinking of getting the eVic, after trying out the one my friend has.
My question for anyone is...What are some of your favorite components, attachments, etc, that would be compatible with the 510-T? Also, do you own a Joyetech eVic? What are your thoughts?