Devils advocate......you don't need one. Unless you're going through pat down or metal detectors.......concealed is concealed.
Now, pending the size of your edc and whether or not your holster needs stored as well, anything that will be out of your way and not visible and accessible will be impossible to find for your vehicle......I've tried and spent $ trying.
Trunk style small safes appear to be the best because of the ability to really secure or bolt them down but some gun owners get nervous when getting stuff in and out of them. No matter what I tried, a trunk style safe bolted down was what I was most comfortable with. The brand doesn't matter as they all can be broken into with the right tools.....just do as much research as you can. There are thousands of gun sites just like TGO where this question has been asked. Read thousands of opinions and get as much information before you commit....