I would take a set of Behringer monitors (3030a, or 3031a probably) over the m-audio's.
Pesronally, I wouldn't take Behringer ANYTHING over anything else, at this point. Most especially, any used stuff. They have a ton of work to do to repair their well-deserved reputation for extremely poor quality and cheezoid tactics. "HEY...those tubes are really a'glowin' in that Tube UltraGain!" (Yep...from yellow-orange LEDs behind them!)
Don't believe me? Just Google "Behringer repair", "Behringer problems" or something similar, and prepare for page after page after page after page.....
At LEAST Google the model and "repair" or "problems", before jumping into buying. Then again, those particular monitors may be relatively trouble-free. It's good to research anything before purchasing, but it's especially critical to research some companies' products, and, unfortunately...they are one of those companies.
They definitely know about their reputation. Hopefully, they WILL eventually get their act together, but they'll have to prove it over time. As long as nobody complains, though, why change?
But, then...more and more Chinese-made garbage that's flooding our shores are cheap and disposable, so they are not alone in prolonging this mess...and sending U.S. dollars to fund the Chinese military through their near-slave labor, human-rights violations and allowing them to create magnitudes more environmental damage than what we can more-responsibly do here in manufacturing...while we're cutting jobs...and everything else.
Sorry. Just getting tired of seeing "Made in China" on nearly everything, 99% of it being cheap inferior junk that just breaks down, drains our dollars, and creates more costs in landfill waste, recycling and repurchasing another item to replace it. Things USED to last (quality American-made stuff). My mother still has a 1949 GE refrigerator that works perfectly, and the only thing that has ever been done to it was a belt replacement about 30 years ago. (Of course, it's not exactly the most efficient fridge, but it makes a good garage beer and pop fridge).
I have a 1949 Kalamazoo amp that still works perfectly, and all that's been changed is the AC cord and 3 capacitors.
Is there ANYTHING made these days that will last 65 years, and still be usable? I guess when we DEMAND "cheap"...that's what we get. And, that's one of the reasons we are sinking.
Kapt.Krunch