Best USB to DVI?

Hi there!
I want to connect two screens to my macbook pro, so I am looking to get a USB to DVI external video card. But I am not sure which one to go for?
I've been looking at: http://sewelldirect.com/USB-to-DVI-External-Video-Card-High-Resolution.asp
and http://www.iogear.com/product/GUC2020DW6/
Does anyone have any experiences with these, which one are the best?
Hope someone can help
Jacob

Hi
To be accurate, VTBook is the old CardBus product. You probably referred to ViDock Gfx Mac Edition, being ExpressCard (http://www.villagetronic.com/vidock). Unfortunately, as it can be seen in the compatibility page, it can work only with MacBook Pro generations 1, 2 and 4. This is due to firmware resource allocation issues that Apple hes never addressed and, seen the recent move with latest systems to abandon ExpressCard, there is not much hope it will be made compatible with the other generations ever.
It seems Apple does not believe there can be people that want to connect more than one screen to their portable system.
Village Tronic is also making an USB solution called ViBook (see http://www.vibook.it/eng ) based on DisplayLink platform that is trying to innovate in ergonomics and dimensions, compared to alternative products, and it is optimized for low power consumption and video quality instead of trying to be the cheapest.
The above information to try to give a correct information for the topics touched in this thread.
All the best to everybody!
Ascanio

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