I use the Boge 2.0 carto's and while without the cone the draw might be a little airy, the cone tightens up the draw quite a bit. I get pretty decent life out of them although they will burn if I don't keep them wet, I vape fairly heavily and I top off about once per hour with 10 drops or so.
As for your question about a vendor carrying both the CE2 R4's and the Boge carto's, you can find both at madvapes.com. Both are $9 for a 5 pack. I've used both and personally much prefer the Boge. I might also add that out of the 30 or so Boge Carto's I have used so far, I have yet to have a DOA but I have swapped a few after 4 days or so because the draw got harder than I liked. If you keep in mind these things are disposable, I believe you would be happy with them.
As for your question about a vendor carrying both the CE2 R4's and the Boge carto's, you can find both at madvapes.com. Both are $9 for a 5 pack. I've used both and personally much prefer the Boge. I might also add that out of the 30 or so Boge Carto's I have used so far, I have yet to have a DOA but I have swapped a few after 4 days or so because the draw got harder than I liked. If you keep in mind these things are disposable, I believe you would be happy with them.