Well I have been smoking for about 16 years at this point averaging usually 1 1/2 to 2 packs a day, 3 on weekends when i go out. And honestly Im looking for something that will actually keep me away from the analogs, I thought going up to these 8mg would be a vast improvement but that was before I looked online and saw that there was a whole lot about these things I hadnt discovered yet. In terms of budget I dont mind spending money to save I just spent 100 yesterday getting this krave1000along with 7 prefilled 8mg cartridges. And if someone could help me understand some of this I wouldnt be opposed to buying another set up right now.
Speaking as one who once smoked 1.5 packs a day (PAD), sometimes more... no way is 8mg going to cut it. 24mg would be a good starting point; you can't go much higher, and you can easily "thin it out" if it turns out too strong. I'd also highly suggest something like an Ego, Riva, or a KR808 (if you get a PCC for it)... you're going to need a lot of battery life, and a stock 510 will probably start driving you nuts in about a month. There are plenty of PV's out there with big
batteries that are readily available from multiple vendors, anywhere from 650-1100mah. An Ego or Riva would probably be a good beginning PV for ya.
Forget prefilled cartridges; they're almost universally gross. Buy your liquid by the bottle, and blank carts to put it in. Get a lot of smaller (like 5ml) sizes at first, and try lots of different kinds of flavors, not just tobacco. You never know what you're going to like!
Cartomizers are "semi-disposable" combination atomizer/cartridges. An atty & cart combined in one piece. They're all I use anymore

. Keep them moist, and you'll get up to a week out of one before it becomes unvapeable... then you just toss it. A cartomizer ("carto") isn't much more expensive than a cartridge, and every time you change it, you get a brand new atomizer. In the long run, using cartos is roughly the same expense as buying new atomizers & carts, less hassle and mess, and just a generally better
vaping experience. Try some of the "soft tip" cartos, esp. the ones by Boge or Smoketek.