At most I will have about 12" of ductwork, but probably not even that. I gotta sleep in the same room as the cab, so noise is a fairly big issue, but so is money. I like the price of the Dayton, but have heard that it is really loud. Have heard the same about the Vortex (mini jet engine was a common description of the 449).

I found a Vortex 4" 172CFM for pretty cheap, but not sure about it's noise level and if it would be enough for my setup.

2'x3'x6' cabinet with a 400w CMH (not nearly as hot as hps). Ambients never higher than 72F.

Any suggestions maybe?

Thanks!