Sunny
I suspect any of the three would be adequate for the requirements you've stated. As George indicated, the Xenyx series is newer, and uses somewhat higher quality components.
If you're settled on purchasing one of the three models you mentioned, then I suggest you go to Behringer's website, print the manuals, and spend a bit of time comparing features and specifications for yourself. I think you'll discover that the differences between the three models aren't worth agonizing over. Trust your instincts, and make a decision.
I do suggest, though, that you consider whether you might want a model that offers a few more inputs.
Charles