Well....it really depends on what you mean by atty-tank. Do you mean specialized tank attys, with metal wicking spikes? My two cents on those? They don't work very well. I realize it does come down to personal preference, but meh. My experience, the draw is very hard, and the vapor tastes either burnt (it's very hard to get these to wick well) or like straight up plastic. I can never taste my juice. I give the system an F minus in terms of using enjoyment. Granted, vapor production is fine itself, if you don't mind the plastic taste, and hard inhale. In my experience there was no throat hit either. However I will say this, it is actually a pretty hassle free system if you can get passed all the bad. I've never had one leak. Once the tank is punched, you can fill it with a needle very quickly and easily (you can also fill by popping off the cap). You can figure about $8-$12 for the special atty (life of attys last anywhere from a couple weeks, to nearly forever, it just kind of depends; they're like lightbulbs). A 5 pack of tanks will run you about $10. The tanks take a while to wear out, if you fill with a needle. They wear out much faster if you keep pulling off the cap.
If you're talking about Tube Tanks, that's another matter entirely. As I understand it, the taste and vapor production is pretty good depending on if you're using a duel coil or single, and the resistance, though I haven't used this system myself. If you're not opposed to polyfill cartos, I don't think it's a bad set up. Warning, I've heard a lot of complaints about a little bit of leaking, and there is a learning curve on these. Because of the auto filling (from the tank to the carto), you can flood if you're not drawing correctly. For vapor production, it's a pretty good system or so I've heard, if not a little complicated. Hassle free? Meh. I'd assume once you figure out how to keep it from flooding, and if you're device doesn't leak, not too bad. TTs run about $10-$17 (depends on size and coil type/resistance), and the replacement cartos are a couple bucks. The cool thing about this system, is that as long as you're careful with the TT itself, and don't crack it (don't put cinnamon juice in it) and are gentile with the seals, it can last you a good long while, you just have to replace the carto when it goes bad.
Clearos, besides dripping are easily my favorite juice delivery system. Flavor, in my opinion, is just as good as dripping, vapor production is great. I just love them. But you can't have it all, they are a bit of a hassle. Depending on the style you get, filling is a bit of a chore. There are some newer designs out there that make it easy, with a simple push in seal that's attached to the mouth piece. I use, I suppose you'd call it the older style. There's an inner cup seal, and outer seal, and then a rubber mouth piece. You have to fill through tiny little holes with a needle. It's kind of a pain, but worth it in my opinion. They're also a bit of a pain to use. Clearos, at least the style I use have to be stored vertically, they absolutely do, otherwise the air passage will flood. It's a simple fix, you just blow it out, but it's still a pain. Also, between the condensation and leaking (from laying on its side) a bit of juice can leak past the inner and outer seal, into the last chamber before the inhale. This can result in getting watery juice in your mouth. I solve this problem with a drip tip

As for price and longevity, clearos are made of plastic, and they can crack. This is another system that you would do well not to put cinnamon juice in. You also have to be careful not to drop them, or anything like that. As long as you're gentile, they can last a good long while though. They will have to be cleaned. I clean mine with a hot water power flush, and dry burn, gets them working as good as new. They run about $10 a 5 pack for smaller sizes and about $12 a 5 pack for the mega sized.
But quite honestly, if what you're looking for the most in your vape, is a decent flavor, vapor production, and ease of use, I really suggest the basic polyfil style cartos. Easy to fill, you just pop off the cap and drip into the device until it's full. Do a handful in the morning, depending on how much you vape it should last you at least a good portion of the day. When vapor starts to drop off (and your battery isn't dying) they need to be refilled. The only time they'll leak is if you overfill. If that's the case you just blow it out. In my opinion, it's not the absolute best in vapor production and flavor, but for how hassle free it is, it'll do.