It depends...what do you and do you not like about your bindings? You've heard they are "way better" in what regards?
I'm still rocking my '05 Murray bindings (same as yours but stiffer overlays) and haven't tried on anything that is substantially better ever since. Todays bindings have a little bit better support than your bindings, but the biggest advantage of the newer bindings is ease of entry. Honestly, I tried on about every 2008 binding and nothing really beats the comfort, overall feel, and support from my 2005's. I wouldn't say anything newer is necessarily going to "perform" better for you.
Go try on some newer bindings at a shop and see how they feel. The new neoprene liners are going to be much, much easier to get your foot into.