I've been in Finland for the past 2 weeks and I went to Linnanmaki and Sarkanniemi, they are a really good parks and I enjoyed every single coaster and attraction.
At Linnanmaki the crazy attraction near the entrance is just AWESOME and the water coaster is also good if you like to get wet
Sarkanniemi in Tampere has a lot of coasters and with the one-day-pass you also have entrance to dolphinarium, to the obsertvatory tower, to a planetarium, museum, mini-zoo, etc... I just loved that park! Oh and Tornado is the best ride ever!! I rode it 4 times *__*
Someday I will go with you guys!
Cya ^_^