Have you considered a Ninja Cooking System? I love mine.

It is like a crockpot but it can do so much more with its stovetop settings.

http://www.amazon.com/Ninja-3-in-1-Cooking-System-MC701/dp/B0093MRWJS/ref=sr_1_1?ie=UTF8&qid=1407713043&sr=8-1&keywords=ninja+cooking+system

Wow. That seems a lot to spend on a slow cooker. I can't think of any that are unsafe.

The Ninja seems pretty cool. http://www.amazon.com/gp/aw/d/B0093MRWJS?pc_redir=1412516198&robot_redir=1

Personally I'd like a slow cooker that has a latch down top for transport and has some programing features. Something like this. Hamilton Beach 33969A Set 'n Forget Programmable Slow Cooker, 6-Quart https://www.amazon.com/dp/B00EZI26GO/ref=cm_sw_r_awd_JFKoub0NQ90J3