+1 I highly recommend the Riva 510 but it is more cigar sized then cigarette.
Yeah, but it's more like a small cigar. And sharpie-sized was mentioned.
The Volt and the Bloog are really only small steps up from the OP's 510 kit, so I just put the Riva 510 out there. I think the Riva would be a good next logical step before jumping into say a Provari or Darwin.