I want to thank everyone who offered advice in this thread, and fill you in on my decision for those of you who want some thread-closure.
Based on your replies and some more research, I came to the realization that the 510 model is pretty much the go-to
device for entry level vapers. It has the most accessories (especially with the adapters that make other models' accessories work with it) as well as a long track record for reliability. Its been around long enough that there won't be a problem finding parts and accessories from multiple vendors which allows me to shop around for the best prices without having to worry about compatibility.
I ended up ordering the Joye 510 no-box starter kit from Cignot (very good
reviews in the forums for Cignot), along with 20ml of Desert Ship
juice (I'm a Camel smoker) and a 5 pack of 510 cartomizers for right at $60 shipped (actually $57 but I also sprung for the $3 priority shipping).
I feel that this gives me all of the great benefits of the 510 (you know what those are, no need to list them) along with the convenience I was looking for with the cartomizers.
Again, thanks to everyone who offered advice, you helped a great deal in narrowing down the overwhelming number of options and information available to new vapers.