Either option will require you to buy juice (e-liquid), but you don't have to buy that from liberty flights, or you can, and pay shipping once. It seems like there are millions of different types, from Pizza and General Tso's to Gingerbread and Key Lime Pie, beverage flavors, bakery, CHOCOLATE, everything edible is practically covered. There's a list of vendors around here somewhere:
http://www.e-cigarette-forum.com/fo...03810-i-guess-its-time-again-need-liquid.html
Scroll down to hairballs post for a list of quite a few.
The JOYE 510 - T is like a mini tank model of the eGo. What's different is the way the fluid is feed to the atomizer. The tank system is newer and claims more vapor.
Both the 510 and 510 - T come with 180mAh. The trade off for the smaller form factor is that you're going to constantly be worrying about charging batteries if you vape exclusively. My first battery was a 180mAH and it lasted about 2 hours before I needed to recharge. I upgraded 3 weeks later to a Riva - it's actually the same price you're about to pay for the Joye 510, maybe a little cheaper, and the battery literally lasts ALL DAY. If you're not worried about it looking like a cigarette, then I'd highly recommend the Riva. If the cigarette shape is too important to give up, then this Joye 510 might be your winner.
EDIT: I visited the site to double check, it indicates that 5 x Tobacco Carts come with the standard 510, and 5 x Blank Carts come with T model. Maybe the tobacco carts are prefilled? I've never bought this model so I'm not sure.