I have a cruzerlite TPU case. It keeps the phones slim profile very well. It has cutouts for all the buttons, which i love, because i feel like some cases that have plastic parts over the button do not respond as well OR are too sensitive. For example, i have a casemate case and the plastic button over the power button is too sensitive, and will randomly restart my phone if i have it in my pocket because it will hold down the power button.
the cruzerlite is high quality, and flexible enough, so if you wanted to swap it out, the back removable case part doesnt rip out with the case!