I usually buy an Australian brand called Netti, they are very good but only cost $55AUD, I have bought other brands like LOOK $85AUD and they were crap, I returned a pair that was wearing thin and loosing stitching after 3 weeks, they were replaced under guarantee and these shorts did the same, they were replaced a second time and are still no better, these were made in Italy.
Considering the chances of crashing and ripping up expensive shorts I stick to what is affordable and reliable.

I buy 2-3 pairs a year.

CHEERS.

Mark