Don't know of any "better" intercoolers. As far as the condensor goes, as long as the used one holds a vacuum, a good AC flush takes care of any residual ick, and yes...you should replace the drier if your system has been exposed to the atmosphere for any length of time. It's really only "required" when replacing a compressor for warranty purposes as it also filters out bits and pieces of failing components...but what about your condensor...could a good radiator repair shop repair yours?