Also, to the OP, you CAN wait, but a lot of the users here complaining about defects are the same people in different threads, or some REALLY unlucky people that have gone through a ton of RMAs and returns and seem to get more from the same bad batch.
The amazon rating for the tablet is 4.5 out of 5.0 stars, with about 70 reviews. I'd say, those are some pretty good numbers. I personally own a 16 GB version I bought at Staples, and have absolutely no issues with it.
Honestly, though, if you feel more comfortable waiting until the threads seem to die down from the initial batch of complaints, then I see no reason not to wait. It's entirely up to you.