Damn, we'll be there in March, so we'll miss it, but a 30,000 person CM sounds rad.
Don't ask me why we chose Budapest. My girl got a green card, and we were really excited that we can finally leave the country (and get back in), so we booked the first cheap(ish) trip we saw.
Ella, when are you returning? I might PM you at some point as well to ask about your experiences there.