I hate those Alesis ones, they're so muddy. But it's a pretty tiny budget for good monitors. Can't judge on the Behringer ones, the only ones I've heard were the 2032 Truths years ago. Thought those were pretty good for the money, but I'm not sure I trust the ears I had back then. If you have the option, go listen to a few sets in a shop and bring a cd you know well, as well as some of your own work.