Anyone find a suitable USB hub that is powered and has enough spacing to allow for adequate cooling?

I found this one but the power supply only provides 2A @ 5V, meaning if each port pulls 500mA you'd only have enough power to run 4 USB Block Eruptors:
http://www.satechi.net/index.php/satechi-12-port-usb-hub-with-power-adapter-2-control-switches

Also saw this one, but could find no details as to its power supply specs:
http://www.rosewill.com/products/1604/ProductDetail_Overview.htm#/Mgnt/Uploads/ImagesForProduct/ImgPrd-1604-Cm[7d4d1f39bfc64a01b8705e5227fc75cf].jpg

Last this one, but the side ports don't seem useable. Also, no power supply specs either:
http://www.digitalinnovations.com/connect-charge-7-port-hub.html

I'm going to use an Anker 10 port hub. 4A @ 12V. They make good quality stuff.

So, I'd be safe to run 5 on this hub right? You guys think we need to blow a fan on 'em?