Well there is good reason to want fixed frame over pull down, the drop l down with develop waves within a year or so unless it is the very expensive tabbed tensioned type
I can not tell you which screen is better than the next. Entry level $500 ready made screens you see on Amazon and Ebay are all about the same. Name brand screen manufactures give you a choice of fabrics and typically you call them and ask them to send you samples to test in you environment. The more expensive screens will have more choices of fabric surfaces, better more substantial frame and are easier to assemble. Pull down and electric have higher quality rollers and parts as the prices go up.
I don't have any other first hand experience as I have only owned a couple of cheap portables and pull downs and Dalite HP 2.8 pulldown (2.8 is no longer made and been replaced with a lesser quality 2.4) You won't find to many people that buy every screen under the sun like they do projectors, they get a good screen and replace the projectors much more often.
Do some searches for Entry level screen or screens under $500 in this forum, the same question get asked at least once a month and around the holidays every week it seems.