I tossed and turned thinking of screens to go with R Pi and having read many forums on screen interfacing , drivers and such I came to the conclusion that a small (19" LCD widescreen) was the best bet , i got one from "Kogan " for around $150 Australian . It has VGA , HDMI , USB , component video ,
3.5 sound in , and everything else , I know it is not a portable solution but think about it , just about every person I know has a LCD TV at home so if you are moving around all you need is you Pi and a few cables to go portable