Hmm we have been here in dubai 3 years. Ds is now 13, he attend a school that was one of only four rated outstanding. All I can say if thats outstanding then god help the rest of them.
Aside from that and some people are happy with schooling, not many I would be surprised if mumoverseas friend in AR (Arabian Ranches) (DXB thrives on acronyms)is actually really happy with school. IMHO of course.
We live in Meadows just across from DMC (Dubai Media City). We love it, yes it is a bit Stepford wives but then so is most of Dubai. In the same area are The Lakes, Springs (smaller terraces of 4 houses rather than stand alone villas), Emirates Hills whcih is massively expensive (houses come with prayr rooms, maids kitchen, elevator etc, parking for 10 cars) so I dont know about your budget but I dont know anyone who can fford to live there. Bit further but still only 15 mins is Jumeriah Islands, quite a nice area.
Have a good look at www.expatwoman.com all the info you need to know and then some is on then. That goes you as wll MABS as it has a section also for AD (Abu Dhabi).
Horse riding is possible at the Polo club, the Plantationa nd other places, generally a waiting list and expensive. Wind surfing is possible as is kite surfing. Not sure where you would get leson but I am sure it is possible.
Basically there is a waiting list for virtually everything because DXB has expanded so quickly all the support services havent kept up, including schools, horse riding, sailing clubs etc.
Most schools offer skiing, gold and sailing as a paid for after school activity.
Decide what you think your future holds ie. how much more travelling you will be doing and it will help you choose a school. Many do IB, other USA or UK. That will narrow your choices, and whatever you do dont be taken in by the school blurb, see for yourself (as always of course).
And of course I have to tell you that on May 31st the temp reached 50 degrees!!! And the paper says no rain for 8 months! However we still love it here.
Any questions just fire away.