just wondering what amount of plants you are looking at growing. probaly not too many less than 8? I have an apartemtn grow and we vent right into our bedroom, the biggest problem is that it is rather warm in there a lot of the time. To problems with smell during veg, and if you get a good filter you shouldn't see any problems in flowering. did you ever consider converting a old dresser into a grow cab? if you get a big one it could work out quite nicely and it dosn't look suspicious at all. (unless someone trys to open it)

400W with a cool tube should take care of all your heat problems, it is really the best way to go.