help with new windows for rental house

+1, Window World sells AMI/Alside products, unless the Champion that you mentioned is specific to your area. Reliabilt or Better Built are both very questionable IMO. I agree with WOW, check out supply houses in your area. Otherwise, around here, Lowes does offer Great Lakes (Plygem) and Serious products by special order which are both okay choices. Not sure if those would be available to you...