the options you are considering are/were typically 2in-2out devices, yet will support many channels plugged in. are you sure you want only 2 recording channels? if not, consider stepping up to a VS-100, or a motu, or as meantioned the scarlett. the advantage of the VS-100 other than better integration with sonar, a control surface, a motorised fader, SD card recording, etc is that you can use it without the computer as a standard digital mixer, and with the computer as an 8 in 6 out device.
i wouldnt go near anything behringer if i was serious about audio quality, their preamps are rather poor.
also, remember usb 1.1 vs 2.0 is just a question of speed and bandwidth. it doesnt matter which it is, because the manufacturer's choice of 1.1 vs 2 will be governed by how much throughput they need, ie in teh case of the zed 14, there are only 2 channels in/out, so usb 1.1 is more than enough. for more, usb2.0 is required.
also consider motu,and rme. the interfaces you are listing vary GREATLY in quality and cost. the behringer isnt in the same ballpark. is cost an issue? if not, then just get a VS-700 and call it a day, or a high end motu / rme
and yes, affects are nice in live situations, but genearlly not that great when you're trying to hear exactly what is comming out of your speakers.
good luck with your choice, and keep us posted