Good luck. You will find that the dealers aren't really worried if they get your business or not, especially if you are after a diesel. They will try and talk you into a petrol which in most cases you can drive home there and then.
My suggestion is if you want one in June buy it in April and it may be there when you get here. My threats to the dealers about getting a Corolla or similar fell on deaf ears with comments like "We only make $600 a sale on the i30 and are not interested in doing big discounts"
I ended up with 2 Hyundai dealers not budging a $, so went with the dealer who threw in the most accessories.
The sales man told me he was selling so many cars it was a joke. The ix35 was walking out the door with sales 5 times better than they could have dreamed about.
Makes it tough to get good deals when its like this