What bad things have you heard about Professional's Choice?
I myself have tried both brands on my horses, and I personally don't like the Classic Equine Legacy. I tried multiple sizes and I just couldn't get them to fit right. The darts never lined up where they were supposed to.
I myself use the Professional Choice SMB 3. I've tried the Elites and I don't like them as much, as they feel more flimsy to me.