This has been a very helpful thread. I'm getting a new bike and was trying to decide whether I should hop on the GPS bandwagon or stick with a traditional computer. I was thinking that going with something like the Forerunner 305 would be useful since I also run a bit. However, after reading about issues with accuracy, reception in forests (which is where I do most of my running), and shorter battery life, I've decided that a traditional computer, with heart rate monitor, will suit me just fine for now.