It's worth it. There. Now you have your excuse. You know you want it. Buy it.
Seriously, now is as good a time as ever. The holiday season is coming around and Amazon is likely to release a new annual Kindle model. Even if you don't want it, it is a good time to get the current model at a discount. There has already been one Lightning Deal for $89 for the KPW2. And the price will probably drop as they dump old stock once the new device (theoretically) gets released.
How much is the convenience worth to you, in monetary value?