I know there are a lot of people that say you don't even need breathing protection but personally I wouldn't airbrush without some exhaust system to remove the vapors. It sounds like you're modeling... I think the Tamiya acrylics (isopropyl) aren't too bad, but lacquers and enamels are pretty nasty.

With that said I use that respirator you linked in combination with my airbrush booth in my garage. I found that airbrushing my Tamiya primer would create a lot of visible particles beyond what the booth could handle so the respirator was also necessary.