I think you guys miss interpreted the Poll :
HVLP gravity or HVLP Siphon , most HVLP siphon guns are pressurized and work well as I used a Mattson HVLP siphon for years and sipped paint better then any top loader I use today , but it is bulky and gets rather heavy ! :-)
It has been rebuilt 4 times in the 17 years I have owned it , I cant use it today as it cannot be rebuilt again as the gun body design is kind of sloppy now .

I would buy one again but the weight and bulkyness is its down fall , they do make a top loader pressure HVLP gun and am debating on buying , or most likely the new Iwata LPH-400 LVB base gun , as it has a real slim gun body and is a very light top loader gun .
I posted a link in the air brush thread on the Iwatas
Spray