Just a few other interesting facts for you.
QR use the A330 on the london routes. All their acft are wholely owned and retired / leased out after about 4-5 years, therefore along with EK they have the youngest fleet in Mid East.
Personally I would go to Doha instead of Dubai. Doha is up to 60% cheaper in general terms and has what I think is THE cheapest duty free shop in the world.
They also fly to Sharjah as well as DXB and that can come in a lot cheaper (enough to make the drive from there to DUBAI very worth it.)
As for safety, I assume all is well, it looks like a well run airline but I only see it from a commercial angle.
Enjoy