good, i'm glad someone else is asking the same question i'm looking for answers to. i'm SURE the first thing folks will ask you is: how many plants are you growing? how big is your grow space? perhaps what strain? all that. the more info you give the easier it will be to get help. i myself am planning to constuct two wooden "armoir" type cabinets. big ones. use both for different purposes but mainly one to house mother plants and one for active bud cultivation. my idea would be to have intake and exhaust vents on the back, so any light would leak toward the wall, i'd want quiet fans (considering 120mm nexus computer fans, but maybe to complicated or not enough airflow), have two intake on the back near the bottom, and two exhaust on the back near the top.

but i digress. good luck!