UMK used to be solid enough a couple of years ago, and actually the act that gave Finland the best result for years now is a rock-ish band that wasn't even popular at the time, so I don't even know why they're trying to push famous artists to do it without having a strong entry/song with them. Sure, they probably attract more viewers, but just to see how they place bottom? I don't think it's worth it.
Dream of mine would be someone like Poets of the Fall, the voice of Marko Saaresto's out of this world, but I'm convinced there are tons of young and unknown singers/bands that'd nail it if they're given the chance...