I would recommend looking towards a screen made by one of the major screen companies, such as Dalite or Draper. That way you can be sure to get a good one. I might suggest something like the Dalite Model B. It is a good basic manual pulldown. Depending on the mateiral, a 45"x80" would run you about $120ish on up to low $200's, and the 52"x92" would run about $150ish to mid $200's. These have excellent feedback here on the forum as well.
Drop me a line if you would like to discuss specifics on them.
Drop me a line if you would like to discuss specifics on them.