I've never worn or seen the Reebok's in person, but as long as the heel isn't compressable (like the powerlifts), then you should be fine. You've already spent the money, if it were me, I'd just roll with them.
At the first meet I went to, a couple crossfitters showed up wearing nike crosstrainers. Nobody laughed at them. At least you have actual shoes designed for lifting. Even if they still let you get your boxjump on.
I can't remember- those aren't the ones where you bake the insole to get it to mold to your foot, right? If not, you could always sell them and jump on the addidas/nike bandwagon.