Uniqlo blazers/linen blazers and compliments

I've never ordered from Uniqlo before, I was thinking about picking up this blazer:

http://shop.uniqlo.com/uk/goods/067535#colorSelect

The light blue one, colour selection is on the right.

If the blazer is decent quality, what trouser material/brand would go well with this?
If not, any recommendations for alternatives?

Cheers guys.

Oh, I wasn't planning to wear it casually during the summer. I've got a job at a creative design company near the end of summer and I needed a top to a suit that doesn't make me look too serious.