There's time. Spain isn't changing that quickly, if you go 10 years from now you'll have a substantially similar experience. Unlike, say, China or Madagascar which will be very different in 10 years.

I enjoyed Spain in a very laid back, relaxed, industrialized country way. An easy trip. Always traveling by train we hit Lisbon, Cordoba, Seville, Grenada, Madrid, and bus tour to Toledo. Original plan included going to Barcelona then renting a car and driving through Andorra (to go there) and France (which has the better road) to Bilbao but it was decided that that was too much for a honeymoon. Someday.