The 24-70 2.8 IS L lens based on the version two without IS exits since a longer time and is an fantastic lens. Many of the 24-70 2.8 II L lenses had massive quality problens and that for a very high price. Even my EF-S 15-86 IS lens feels more solid like my 24-70 2.8 II L production lens (only the zoom function). The prototype/ preseries version however is fantastic.
I see it in the price range 2.399 to 2.499 Euros.
I echo the concerns of quality issues with the design and manufacturing of the 24-70 II.
There are not one, but two multi-page threads about multiple people having to return their lens for a new copy 3+ times because the barrel clicked or squeaked when zooming. One person had a copy that was fine, then started squeaking over time. Amazon even had to pull the lens off their site for some time while they investigated all the complaints. Clearly, there is something in the manuf chain or design that is not right with this lens for a $2200 piece of equipment. If it was a $500 kit lens, fine, but it is not... This is one of the big reasons I have not bought this lens.
It is long overdue, Canon needs to stop playing games and release the 24-70 f/2.8 IS, preferably in a design that is less problematic than the 24-70 II. Tamron, of all companies, is showing them up! Can't go ragging on Tamron for build quality when the Canon that costs twice as much clicks and squeaks away... In the meantime I will continue to use my primes and aging zoom.