I've had my current iMac for several years now. It's running Mac OS X 10.4.11 with a 1.83 Ghz Intel Core Duo Processor and 512 MB of RAM. It's been freezing quite a bit as of late and I'm guessing it's just due to its age and the fact that it can't handle its commands. But should I tough it out a little bit longer for a potential iMac update at WWDC or should I just get a new one now? I don't want to be stuck with an obsolete model.