Waiting is not bad thing if you know that a new product is very likely in the near future. For example, a press event is being held by Apple regarding the Mac,etc.
That's what I did back in August '07 as I knew that the new style iMac was on the way so resisted the temptation to buy a white bodied one, even though I needed it at the time as my Dell PC went tits up. I recall being in the Apple store in Tokyo, watching the sales people flogging the 'old' style iMac in full knowledge of the fact that they had the new, possibly cheaper and higher specced units coming in later that day, as they were just waiting for His Jobsness to deliver the good news back in the US.