Yes @auntiehill just ignore my Airlingus comment. I was speaking from teh internet 
And I didn't realize you were going next year, thought this was for this summer. You're in a great position then to monitor all the sites and wait for your bargain deal which WILL come. Don't forget to immediately after buying the ticket buy travel insurance that covers you if you can't go due to illness or whatever. It's not expensive.
As to weather, yeah April may be quite chilly and the advice to NOT GO AT EASTER is very important ! But there's advantages to not going in the summer if you're going to a country with a lot of tourists. You are literally in a sea of tourists if you go in summer at some spots compared to other months. I'd be leaning towards May though weather wise, not because of it being chilly but because of rain.

And I didn't realize you were going next year, thought this was for this summer. You're in a great position then to monitor all the sites and wait for your bargain deal which WILL come. Don't forget to immediately after buying the ticket buy travel insurance that covers you if you can't go due to illness or whatever. It's not expensive.
As to weather, yeah April may be quite chilly and the advice to NOT GO AT EASTER is very important ! But there's advantages to not going in the summer if you're going to a country with a lot of tourists. You are literally in a sea of tourists if you go in summer at some spots compared to other months. I'd be leaning towards May though weather wise, not because of it being chilly but because of rain.