linux/gentoo USB to VGA info/feedback needed

[jms.gentoo]

Hi all,
I am looking for info feedback on the usb to vga status under gentoo.
As anyone a set-up with this?Is it working? how well?How easy it is ?any advice?hardware?

why : I am looking into buying a asus U47VC http://www.asus.com/Notebooks/Superior_Mobility/U47VC/#specifications
unfortunatly this laptop come without vga port or I am now addicted to twin view/extended desktop for work and external monitors (home and work) are vga
need it to work with laptop lcd 1366x768 and monitor 1920x1080
hope this can work with intel Intel HD 4000 or nvidia NVIDIA® GeForce® G 620M

So I am looking into usb to vga

So far, from what I have been looking at on the net the status seems (to me) unclear.
How easy it is ?any advices?


Here for ubuntu they talk about using sisusbvga
http://askubuntu.com/questions/8747/usb-to-vga-video-adapter
http://www.winischhofer.net/linuxsisusbvga.shtml

here
about udlfb ( DisplayLink )
http://www.linuxquestions.org/questions/linux-hardware-18/usb-to-vga-with-linux-899226/

.phoronix testing Two of the devices are the DC-125 with the DisplayLink DL-125 chipset while the other two are the UD-160-A with the DisplayLink DL-165 chipset that can output up to 1920 x 1080 over DVI or VGA.
http://www.phoronix.com/scan.php?page=news_item&px=MTA5NjY

one product Plugable UGA-2K-A USB 2.0 to VGA/DVI/HDMI Adapter for Multiple Monitors up to 2048x1152 / 1920x1200 Each (DisplayLink DL-195 Chipset)
http://plugable.com/products/uga-2k-a/

some other usb to vga..
[url]http://www.amazon.com/StarTech-com-Multi-Monitor-External-Adapter/dp/B002FJQXXC/ref=sr_1_3?ie=UTF8&qid=1350914222&sr=8-3&keywords=usb+to+vga[url]

http://www.amazon.com/StarTech-com-External-Video-Monitor-Adapter/dp/B005G306I2/ref=sr_1_6?ie=UTF8&qid=1350914222&sr=8-6&keywords=usb+to+vga

http://www.amazon.com/IOGEAR-External-Video-Card-GUC2015V/dp/B000NJFJJK/ref=sr_1_4?ie=UTF8&qid=1350914222&sr=8-4&keywords=usb+to+vga

Appreciate if anyone can share his/her experience about this.
Thanks