Need some help/advice with ventilation

I have a question about ventilation and was hoping you guys on roll it could give me some advice. Ok so here it goes i have 2x2x2 room i wanna make into a veg/mother/clone room and i also have a 2x2x3 room for flowering. This is obviously going to be a micro grow with cfls but now on to my question. I cant decide on what to buy for ventilation?! I know everyone says duct boosters are pretty much garbage, they break down easy, they're noisy and just all around suck but they are cheap which is always good in my book and my rooms are small so i think they could push enough cfm to keep my plants nice and happy =P My other choice would be inline fans. the rooms are close enough together that i could just use a duct splitter and run one larger inline fan instead of two small duct boosters. Give me some advice on how you guys would set it up and what fans and cfm rating YOU would use if you were working with the same set up.
Thanks alot guys
Oh totally forgot something i will be venting into the roof if that changes anything.

could i get a little help please =D