I have the iwata Revolution HP-CR with a 0.5 needle for a medium spray, and I also have a cheap Chinese £17 special with a 0.2 needle for fine work and it hasn't let me down yet. As for Air, I was looking at iwata and similar airbrush pumps, but I went for a larger Hyundai Compressor that I can also inflate my car tyres with. It took a bit of messing getting a moisture trap connected, but I can unplug the trap and plug in the standard hose with an air gun and blow the dust off the item to be painted, then quickly switch back. It is far more powerful and stores air in a tank and can be used for many other uses. It is quiet compared to older types and is oil free. https://hyundaipowerequipment.co.uk/hyundai-8-litre-air-compressor-4cfm-118psi-silenced-oil-free-direct-drive-0-75hp-hy5508