Air Purifier for Small Room

I am planning to get an air purifier for my home office. The room is relatively small in size. Hence I guess a portable type air purifier will do the job. I have been going through many air purifier review sites, including Cnet. There is a water jet machine shop next to my office. The dust from abrasive water jet machines are really hazardous. Air purifiers will filter most of these dust particles.
So far I liked few models from Honeywell. Right now I am inclined to Honeywell HHT-011. I guess I need to check out the Honeywell website for more models before I make a final decision.