I use an IWATA LPH400. Probably overkill if you're not doing clearcoat.
I also just invested in one of these.
The CFM rating should do the trick and I will get plenty of use out of the compressor for many shop tasks, including running various air tools, sandblasting and other stuff.
But, if all you're doing is shooting paint, you may also want to look into some self-contained units that don't require the compressor.
They can be loud (unless you spend $$$ on the higher end units) but a good all-in-one solution for HVLP. I would not shoot auto clear with it though... maybe varathane.
The models I was looking into were from FUJI and I think they are even made here in Canada.