Do they have a Sams club near you? For the past few years I have using a pair I bought from Sams' I think they were $25 each. They are 250', they have the heavy duty Metal fittings, they do not kink,. I have been dragging mine around my landscaping, over fences, all sorts of crap. As for a desert heat, I am not sure, they have weathered 3 summers in the NC piedmont (85-100 degrees). So we got SOME heat, probably alot more humidity.
If you go to Sams to check them out, be careful they usually put them next to soaker hoses so it is easy to grab the wrong one of you are not watching the labels.