Other than the Bionic is garbage and the Rezound is awesome....
Based on the new video we saw of the Ville I would upgrade as soon as possible. If that's not out anytime soon and at BEST will have the same hardware specs the Rezound has then you will be holding the top of the line hardware until my guess next fall or holiday season. I don't see quad core or phones with 2g of RAM coming out much earlier than that.
Upgrading now will leave you close to a year before you are looking to buy the next best thing, leaving another upgrade just around the corner. And you can do this now at no cost. To me it is a no brainer.
Seeing as the Rezound has root and will have ICS you will have the most up to date software that is out as well, mentioning root to say if you don't like sense then take it off, problem solved.
Logically it is the way to go.
Emotionally, if you like the "form" of another phone or manufacturer then upgrade and get that one. Either way, smart thing would be upgrade now.
Just my opinion.