So, from what you get, it's gonna be either Groen or SPA, as you seem to value the ecology a lot. Since you voted Groen last time, I'd say either continue with it, or vote SPA if you want to change it up a bit.
Now that I think about it, you're right. I'm definitely going to vote green for Europe, since the environment is a very international subject.
Still not sure about the national elections though, but I'll try to read some more on each parties viewpoints this evening.