Once again, it really depends on what sort of trip you're looking for. If you are after a relaxing trip in beautiful weather your best bet will be Málaga, which tends to get more sun year-round and has ideal access to Costa del Sol. If sightseeing and history is more your thing then Seville is the place to go.
Is Málaga classy?
Málaga has become a thoroughly chic city, boasting exquisite architecture, sunny beaches, stunning botanical gardens, fabulous cuisine and a culturally dynamic art district.