I don't know about the x5, but I have a 1910 and it is nice cause it is small. I have an aluminum case I bought from compusa a long time ago and it can fit into my pockets pretty comfortably (I little uncomfortable in the front pockets but fine in a jacket pocket). I think you can't browse internet on it cause the sd card slot is not SDIO. I ran across this. It might help.
http://www.mobiletechreview.com/tips...comparison.htm
I would spring for something with wifi, but that is just me. There may be a way to get it on the 1910, but I don't know how (i'm not very experienced with this stuff).