I can highly recommend the Wii.
I regulary use Wii FIT PLUS but spend many hours a week playing Wii SPORTS and Wii SPORTS RESORT.
They really help me with my rigidity and depression.
Don`t forget to exercise those little grey cells too - I find Wii BIG BRAIN ACADEMY and Wii MENSA ACADEMY
help keep me mentally active.
I firmly believe that regular exercise has had a profound effect on delaying the progression of my Parkinsons symptoms.