Which lightbox to buy for the best quality-price?

I am ananimation student and I would like one to work at home. So which lightbox would you recommend to buy for the best quality-price? 10ft or rather 12ft?
I have seen two lightboxes models from Lightfoot which look good: http://www.lightfootltd.com/catalog/lightboxestables/personal-lightboxs
One has a slanted surface, the other one is more like a robust box. Any opinions on those? Thank you