I agree with Don. The part I'm not sure about, is the end cost to you since you're in Ireland.
I have the Yongnuo YN568EXs (Qty 3) and the Nikon SB-910 (Qty 2). I've also had the Nikon SB-700. The YN568EX is more comparable to the SB-910 than it is the SB-700, but it's still priced...