I have both a fairly high end vape and a PHX bong, so I guess that qualifies me to answer your question somewhat.

Volcanoes are nice, but comparably nice vapes can be found for much cheaper, I got my vape (not sure of the brand, digital temp. hands free whip) for less than 150 dollars at a local head shop ( i know the owner, but still a solid price), and I couldn't be happier.

The PHX on the other hand is a great piece. I have hit many different bongs (ROOR EHLE, lots of the big name brands) and have been very pleased with the PHX. There is some drag in the perculators (tree percs would solve this) but overall it is a serious bong, I would recommend this over a ROOR anyday.