air purifiers for wood smoke - advice sort

Hi, I am urgently looking for an air purifier that will be effective against wood smoke that is coming into my house from my neighbors stove. I think I need one that will filter out very small particles, less than 0.3 microns. So far I have identified Blue Air (with smoke filter) and IQair as possible options. The IQAir one sounds really good but is very expensive, twice the cost of Blue Air. I had read elsewhere that the Blue Air one may suffer leakage round the sides of the filter. I would be very grateful for any advice, or to hear anyones experiences of using filters for wood smoke removal. Neither are cheap and I just want to make a good choice as the IQAir especially is very expensive in relation to my wages and I want to try and make sure I make a good choice. Very grateful for any advice. Thanks, Jo.
PS I have no idea where the photo came from and I can't get rid of it, so if it belongs to another user my apologies!