I know a lot of people that would stock up on some new kit for a week away.
Personally, if I was heading away to somewhere sunny, I'd be thinking along the following:
New swim shorts: 40 quid
Couple of t-shirts: 60 quid
Toiletries: 15 or so
Something along those lines anyway!
About the same here, the missus will spend HUNDEREDS as all of a sudden everything she owns is wrong for holidays lol