I had the exact same decision to make!
The giants announced now are not the last shows and to be honest if Im going to giants its the last show I personally want.

I've decided to go to MK night 2 (and Dublin of course)
I would love love love to go to giants. But I checked out the flights, then accommadation on top of that. Its just not worth it right now. So I will wait for next time and save.