I am currently converting a older masonary building into my home. The Exterior walls are 8" concrete block followed by 1" foam insulation and then 4" commom red brick exterior. The windows are older (20 years) single pain double hung windows (no pulleys or anything). The windows also have storm windows installed. I am assuming that during the renovation it would be a good idea to change the windows (tell me if I am wrong). Should I go with a vinyl replacement window like American Craftsman from Home Depot, or frame the masonary opening for a quality window like Anderson or Pella? Also exactly how do windows attach to the masonary opening? I am assuming I need to take a 2x4 and create a frame within the opening for the window to attch to....is that correct?