Your problem is that you are just going to have to try them and see if you like them.
I got some cheepo's at Harbor Freight and the straps just didn't work for me. I got them for doing work around the house and yard. My last pair came from Ace Hardware, but I haven't used them that much to tell if I really like them or not.
I wore my knees out climbing poles, and ladders. Not to mention crawling around in crawl spaces. Now I think twice before I even get down on my knees. But for around the house I picked up a couple of knee pads at HF. But they would be worthless hunting.