Just wanted to chime back in with an update.

I got back from my business trip on Thursday, and had both the 510 and the eGo-T waiting for me. I've been vaping both of them back and forth for the last couple of days. In that time, I've had 5 analogs total - down from almost a pack a day!
A couple of quick newbie notes:
The 510 - Not bad! Filling up the carts is easy, and I don't know what the "stock" liquid is in them, but it's the closest to a normal smoke out of all of the juices that I picked up. Battery life seems pretty solid, I'm charging them here and there, but I had one last me all day and into the night.
I got a passthrough, but the actual use of the device eludes me. It connects via USB, but the connection on the end of it is threaded incorrectly to match up with my atty(s). I'm not sure if I just got the wrong device (it says Joye 510 PT on the box), but either way, I'll be sending it back. I have the PCC for it as well, and it works as expected.
The eGo-T: Awesome, it's my main eCig. Again, great battery life (I'm yet to kill one), charging is easy, filling it is easy, and the no-mess aspect of it compared to filling the carts on the 510 has me sold. I picked one up for my mother as well (a 30+ year pack-a-day smoker) and in the last two days she's had TWO analogs.
I think the smoke of the 510 is a little smoother, the eGo-T is a bit stronger of a draw, but the ease of use of it, plus the fact that you don't need a primer puff like you do with the 510 just puts it over the top for me. Both are great, and it's nice to have both of them around the house/in the car to mix things up.
For juice, I'm using "Tobacco" 18mg from e-smokeytreats.com, along with "coffee", "energy" and "Green tea". They all taste pretty much the same, really, though overall I like the Tobacco in the morning, and Coffee in the afternoon, since the latter has a bit less taste to it. E-smokeytreats.com was awesome to deal with, everything shipped super fast and my order was spot-on both times.
The only thing I don't really care for is that after a while, all of my juices (Regardless of eCig) kinda taste like vegetable oil. I don't know if it's my taste buds just getting used to it, or the fact that my sense of taste is coming back a little bit from not smoking (much) over the last 3 days. I'm definitely going to try some different juices, either way.
That said - thanks for all the great advice everyone! I already feel better (though it's probably quite a bit mental, but hey!) and am extremely happy with both the 510 and the eT. I have one emergency pack of smokes on hand, and I'm hoping that in a week or two I won't even need that.

It's amazing how BAD an analog smells when I break down and have one, even after just a couple of days! Every time I have one, I have to scrub my hands and brush my teeth like a banshee. I take this as a good sign!
