Can't you get an inline for similar cost...compared to the bathroom fan? The reason I ask is all the "fart fans" that I've had to turn on (lol) were loud as hell. I would think almost any inlines would make a more manageable humming-type sound. For the record, I don't use inlines. I run dedicated a/c (since there's 1600 watts in there as of today).

But anyway, back to your question...unless you have one on hand already, making it free---I'd look for an inline. Most cabinets need waaaaay more ventilation than they get. Look up the image reaper, he's been runnin a cabinet for a good while. He'd be a good person to ask ventilation questions to.

Good luck!