Greetings!
I do not claim to be an expert, but I can report (as I have elsewhere in the Forum) that my second brand of touchscreen greatly improves upon the first. In March/April I ordered Elo model 1930L just as a shipment was due to arrive in LA. The version I have is based on projected capacitance, which may have become their dominant approach. The touch accuracy is superb, extending a little beyond the screen image (I can call up the retracting Windows task bar with my finger). The front glass (yes, the FRONT surface is glass, not plastic) is completely flat and smooth: a "zero bezel" design. The picture is extremely clear because both layers in front of the monitor are glass. The unit itself is "open frame," meaning that it does not come with a back case or stand. It does, however, have a standard 100mm VESA mounting capability in the back, and it can be used landscape or portrait. I have used leftover speaker grill cloth as a back cover. You can check out the specs at elo.com. I can also recommend www.touchwindow.com as the marketer through which I made the purchase.
Good luck!
Don