from my personal experience, saving money on tools is not smart, look after Gebe tools, they are good example of quality=price. I believe they sell over whole europe. Gebe tests tools and if quality meets their standard, they will name it an sell it. There is a chart you can look at. it looks like this.
Air tools, dont buy the cheapest, turbines inside tend to wear out quickly. To keep turbines in good shape I would recommend to get a Oil-Fog smearer. Inexpensive, but effective protection.