Need to get another quote for HVAC repair- recommended companies?

We are going to have to do some repair and cleaning work for our mini split system (this seems to be the source of the odor I asked about a week ago). We got one company to come out and they are going to give us a quote, but I think we should get a second opinion/bid before going with someone. We had All HVAC Service Corps come last week (they are listed on the services page of Brownstoner). Should we get another big name like Ice Age? Anyone have someone to suggest? Thanks.