[quotemsg=10911218,0,298920]Isn't there a flaw in the Z87 technology regarding sleep mode? Was it mentioned in the article? I didn't see it.[/quotemsg]Did you read the Haswell review? All current boards are affected, no future boards will be, there's nothing to update here, and the flaw is virtually meaningless.
http://www.tomshardware.com/reviews/core-i7-4770k-haswell-review,3521-9.html
If you have one of the affected drives and can't be bothered to reconnect it when it goes offline, wait a couple weeks and buy a board from the new batch.
The differences between boards in today's review are overclocking, power consumption, and onboard features. None of those things will change with the new PCH batch, and firmware updates should improve both batches equally.