Miglo,
I agree with drusso. Osteopathy is strongest in the Northeast and especially in the Midwest region of the country and therefore the opportunities for a variety of rotation and residency experiences are abundant. Unless things have changed recently, Michigan is still the largest of the DO "friendly" states. I live in the Detroit Metro area of Michigan (3/4 of our state population is located there). I live within say 30 minutes (maximum) of around 10 osteopathic hospitals not to mention a multitude of allopathic/osteopathic hospitals. Because of this, many of you will find that Des Moines, Chicago, Kansas City and others actually offer rotations and residencies in Michigan.
Basically, it all comes down to what you want to do. All the schools are good and if you put the time into it (i'm sure we all will) then you'll become an excellent doctor. However, if you want to get into highly specific specialties I think your going to be a little disappointed by the lack of opportunities out west. Then again you and others can help change all that by staying out west and forging ahead with your dreams.
DocGibby