120 Volt Outlets With USB Port(s)

Every time I go into a store that carries these and I see them, I ponder buying one, or more. What I don't know is who makes the best ones and who has the best prices. I would be okay with four 120 volt outlets, but six would be better. I am okay with 3 USB ports, but I prefer at least 2.1 amps, but if someone makes one with 2.4 , or more amps, that would be good, too. So, obviously, these are NOT all created equally. Who makes the best, or at least some of the better versions of these, and where can I buy them at a reasonable price? Also, how well do they work? I like the idea of fewer visible wall warts around the house.

http://www.bestbuy.com/site/insigni...tion/5741079.p?id=1219156094705&skuId=5741079

The Insginia one above just happens to be a version that I saw at Best Buy earlier today, but I know many others are on the market. Maybe I need to look around more at Mono Price. The one I found is less expensive, but also has only 3 outlets and two USB ports!
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http://www.bestbuy.com/site/searchp...t=n&iht=y&usc=All+Categories&ks=960&keys=keys

I ended up finding a 6 outlet 3 USB port power hub at on BestBuy.com and I might end up ordering this one after all!

http://www.monoprice.com/Product?c_id=109&cp_id=10907&cs_id=1090701&p_id=9195&seq=1&format=2

Leviton has some cool hard wired USB outlets. I just installed one in my new kitchen, I'll let you know how it works out. 4 USB ports in a standard Decora outlet size, up to 4.2 amp charging rate.

I've install a few of these in my lab and for a few clients.
They are quite nice but for most applications they are in an inconvenient location thus requiring the very long usb cables, otherwise your phn winds up sitting on the floor or some other undesirable location.