I've heard bad things about vaporstar. I think the LSV is your best bet. It connects directly to any glass and produces some of the best vapor out there. Cheaper options would include a Buddha or Vtower running through a whip. The Solo would actually be a solid option too, as it connects directly. If you can save up for it though - the LSV is no question.
LSV or a log vape of some kind would be your best bet for a reasonably priced vapour bong combo. Hell, I really enjoy using a SSV with a bong.