Kyongju is very very overrated, I moved to the city almost 6-months ago, choosing a job there over one in Seoul because I had read about how beautiful it was meant to be. Quite frankly I am very disappointed.
The city of Kyongju is a hotchpotch of modern 1980's building which have been erected with absolutely no regulation or proper planning. In amongst this high rise hell are to be found a scattering of very unimpressive historical artifacts many of which would not be given a second glance were they to be found in Europe. OK the burial mounds are impressive, but they are not captivating in the way an old medieval town is.
Out with the city of Kyongju itself (it should be remembered that despite Kyongju being marketed as an open air museum some attractions are 20km away) things are much better. For example the temple at Bulguksa is absolutely fabulous as is Seokguram Grotto a short walk away.