We looked at the obstructed on the Spirit las Jan. and decided to go with the balcony instead...for a few dollars more we had a great view of the ocean on the 4th deck and even got to see a humpback whale submerge about 40 yards off the ship. Would have missed it with a an obstructed view.
We are forever hooked on balcony cabins. Although price is always a consideration, I'll just cut corners somewhere else because the balcony cabins are....awesome.
Just my thoughts.