OP, only you can answer that question. How can someone else tell you what you should do with your phone? We don't even know how you use your phone, or what types of things are important to you in a device.
However, my question is this. If you were so interested in the next gen phones, why did you get a Bionic to begin with? If you'd have simply waited, you would have avoided a restocking fee.
Me, i'm happy with my Bionic. I'll be happily running my established OS on it (GB) while the Prime owners get to beta test ICS. Once the bugs are worked out, I can enjoy it on my phone since the Bionic is almost guaranteed to get an ICS upgrade. Heck, the stock filesystem is already set up for Honeycomb and ICS.