Bluetooth A2DP / Apt-X / Bluetooth 4.0 Headsets

I would like to buy a set of nice wireless stereo headphones for use with the new iPad 3. However I've been reading some technical articles about the shortcomings of Bluetooth A2DP (specifically lag more than anything). There is a great article from 2008 over here about it. [URL]

It seems the only choice we have currently for low lag, high quality Stereo headsets are to use Apt-X headsets (like Sennheiser PX 210 BT Apt-X) along with a dongle to give the iPad Apt-X compression ability.

It seems mad to me that the newest iPad and iPhone 4s don't support Apt-X natively yet, although they include Bluetooth 4.0 as standard which hardly anyone else uses yet.I'd love to be able to use Bluetooth 4.0 if that enables low lag stereo audio, but of course there aren't any BT4.0 headphones out there yet to test this.

The reason I need low lag is I want to use them when playing games, and obviously I don't want to be hearing sounds 0.5 seconds later than they occur in-game. Does anyone here have any real experience of the Apt-X solutions in relation to lag and sound quality? Also is the dongle a battery drain?