[Closed] HVLP sprayguns etc

i've just at last bought a compresor and want to spray wooden shutters with oil-based exterior satin, thinned with white spirit o course.

i've heard that hvlp guns are the way to go. a quick look at machine mart cat. shows gravity-fedone and regular ones with pot underneath.

also there is a low vol med pressure one, gravity fed.

can anyone sort out the differences for me?

i haven't done much spraying
and would like to use for emulsion on walls/ceilings eventually too (which suggests getting bigger pot?)
what should i get?
i guess it'll be a compromise as smaller ones would be nicer for detail work.

compressor is 3hp btw