Used to have the BCD436HP and what I can tell you in my perspective is that the best site that you are able to get was the Cook South - Simulcast site. Cook North / NWCD - Simulcast site was fair but I was not able to get anything that I want to receive. DuPage County - Simulcast and Lake County - Simulcast sites were by far the worst as simulcast distortion really kicked in to where I was not able to receive anything. Like what everyone else has said, the SDS100 or SDS200 will solve your issues with simulcast.
IF you don't want the SDS100 or 200. My best bet would be a Unication G5 VHF (typically recommended) or with the UHF-D band model. Easily able to carry around, loud speaker, able to program however you like. The only issue is you are not able to mix trunking and conventional systems together as that is the only issue there.