Monitor Speakers for a Harman Kardon AVR-147

[BVG]

Hello there

I would like to know what is the best monitor speakers going with a harman kardon avr-147.
My budget is a little small (500€)
My living room is about 20m2.

Please, give me your sugestions and opinions
Thanks again!

Regards,
Bruno Gonçalves

 

[BVG]

Anyone?