First Time Grow! Looking for advice/help!

Hey guys, been a member on here for awhile and now going to start my first grow in about 3-4 weeks. Im growing in my closet which is about 5ft Wide, 2 1/2ft Deep & 6ft Tall. I' thinking about purchasing a grow tent that is 48"x24"x60" due to stealth is the major key for me. I'm also contemplating a 4" inline fine with a muffler box around it for noise and for the heat, I'll have a inlet hole to receive air and and exit hole which the fan will be hooked up to with the carbon filter. I plan on doing 4 autoflowers with an aircooled 400w HPS or 600w HPS, any suggestions on which one? I plan on ordering from attitude and getting 1 WOS Afghan Kush Ryder, 1 Dinafem White Widow Auto, 1 Short Stuff Blue Himalaya Diesel, and 1 WOS Pakistan Ryder. Should smell be an issue with this strains with the fan and filter? I will be putting them each in a 5gal bucket. I also plan on having 1 or 2 fans going to circulate the air inside. Should I go with the tent or without? I'm looking for ANY help/advice, it is greatly appreciated!

i know you can get a 600w light for the same price as the 400w light

and yes smell will probabally be an issue. carbon filter and good fan are a must.

and tents work well, if it will fit then i would say go for it.

actually the 400w is more than the 600w

Will heat still be an issue with a 600w if its air cooled and hooked up to the fan? That's what stopping me from getting the 600w compared to the 400w is im unsure about the heat.