Ruined said:
OP specifically mentioned issues with exposures not looking on the screen like lightroom when he gets home.
To address this, be aware that many tablets have a limited color gamut, and will ALWAYS look different from a nicely calibrated color monitor with a wider color gamut. There is nothing that can be done except to be sure you pick a tablet with as wide a color gamut as possible. Neither Lightroom or any other software can fix a limited color gamut.
The DisplayMate web site evaluates a lot of mobile displays for vatious charcheristics that are of interest to Photographers.
http://www.displaymate.com/index.html
You can see the extensive results here for some of the full sized tablets. If I were going to pick a tablet which would have a display and colors that were as close to a real monitor as possible, it would be a Kindle HDX, followed closely by the Ipad air. The Surface RT is good but the Samsung is a step down.
http://www.displaymate.com/Surface_RT_ShootOut_1.htm