I buy all my cartos from Crystal Clear Vaping. They have very good prices, and free shipping which is nice when you just want to buy some cartos. I use the 1.7ohm Ressurector cartos bc right now Im using them on a 3.7V E-Power. They arnt for a VV device though or for higher voltages, bc they are low resistance and are designed for 3.7V PVs like the E-Power, kGo, Riva, etc. So their awesome if you want to use them on a 3.7V PV, but if your looking for cartos for something like a VV device, you def dont want them, or any other Low Resistance cartos.
I like the Ressurectors bc they produce a ton of vapor even though their single coil, and they give a great vape. I like the Boges too, but like the Ressurectors more bc they are XL, so their the same size as a dual coil carto, and hold about 2ml of juice, which is about twice as much as the Boges hold.
CCV also sells the Boges and they have the 2.0ohm and 3.0ohm ones. So if your getting them for your V-tube, you def want to get the 3.0ohms. CCV also just recently started selling the SS Boge XL 3.0ohm cartos too. So their the same as the regular Boges, but are the same size as a dual coil carto, like the Ressurectors are. That also means they will hold quite a bit more juiceas the regular Boges as well. Heres the link to them:
Crystal Clear Vaping
Thats for the XL Boges, but you can click the cartomizers link on the left side if your looking for the regular size 3.0ohm Boges.
You can buy single 5-packs, or you can get click on the 15-carto deals, and buy 15 of whichever ones you want. I recommend getting the 15 pack deal bc the price is alittle better than if you bought 3 5-packs seperately, and with the 15-pack you get a free drip tip of your choice. I always buy 15 at a time and its def a good deal. Dont forget to put in "ecf5off" for 5% of the order. With the discount you can get 15 cartos and a free drip tip for $20 shipped, which is a damn good deal.
If your planning on using them in a tank, make sure you get the SS Boges. Also think about if your going to use a regular tank or a dual coil tank, bc if you get a DC tank, the regular size Boges arnt big enough. I have a few of the Smoktech tanks now and I really like them. They are cheap and work great with the Ressurectors on my E-power. Im going to buy a 15-pack of the Boge XL 3.0ohm cartos bc they will fit perfectly in the tanks I already have, and then I can use them once my SS V-tube comes in. CCV also sells the Smoktech tanks as well and they have the 3.5ml tanks and the 6ml tanks. The 6ml polished aluminum tank would def look super nice on a SS V-tube.
Hope this helps!