The first link is your best bet.

It is a little pricey but you cant fuck around with the smell...it will indeed only get worse.

That unit you have selected...get the 8" canfan at least.

Also, you dont have to worry about venting the filtered air outside or anywhere...you can simply let it blow into the room and recirculate.

That unit will scrub the air extremely effieciently, however, does make some noise. You can also get a variable speed control to keep it down when the girls are sleeping as they wont smell as bad then and you can save some juice.

Its a very stong unit...very heavy too!