What kind of pc fans should i get?

Ok so I am working on building my first grow box while my beans are in the mail. I have the stealth box and lights all figured out. The box has an interior dimension of 2ft high 2ft long and 1ft deep. I know its not very big but its what i was able to build and still keep hidden enough. Ok so on the inside i have 6 growbright cfls at 25w each. Supposedly each one produces 1,800 lumens but i dont always trust the numbers they give you. They are 6500k for the veg cycle. My box needs to be as stealthy as possible, and I have it currently constructed where it is almost air tight which means that almost no light escapes which is perfect, but the thing heats up like a bitch when the door is closed. So i want to put two or three computer fans in it to cerculate air. I am thinking two fans to push air in and one big one to push air out through a carbon filter. So what type of fans would you guys recomend? I would like them to be pretty quite but still be powerful. I want to get them online sometime soon so that they get here before the beans come so i have time to fabricate them into my box. Now this is where the other thing comes in. When i put the fans in the outside of the box how can i cover them up so that you cannot see light yet it doesnt mess with air flow? I will try and take pics of my box tomorrow to show everyone what i am dealing with.

also just on a side not i am going to be growing in soil and was wondering what the best type of nutrients are and honestly i am such a noob i dunno how to use nutes so if someone could fill me in on that. And lastly how many plants would you suggest i put in my box. I am thinking 2 at a time. I have 5 hindu kush beans coming and am hoping i can try three to start off with just so that i know i can get a female and then maybe from her i can take some clones and save the extra to seeds just in case? Any and all help would be greatly appreciated!!

Thanks!!

Alright after doing some research I think I found the two fans I want to get. The first is a 4in In-line duct fan that has a cfm rating of 40-80 for the intake, im thinking if im am refreshing my 4 cubic foot box with 40-80 cfm that should be well over enough, and then for the exhaust i was thinking about going with a 6in in line fan that has a cfm rating of 160, but I am going to be attaching a carbon scrubber to it so i think that the two will equal out pretty well. Is this way to much power? should i stick to computer fans? how loud are they going to be? HELP!!!

thanks!

Look here for fans -http://www.newegg.com/Store/SubCategory.aspx?SubCategory=573&name=Case-Fans

You can view their CFM and db levels

By the way, there are CPU fans with CFM levels over 160 for $10