I always liked running hf mobile when I drove long haul. I always wanted a screw driver antenna just never pulled the trigger on one. Tar Heel seams to be one of the better ones and I was not impressed with reviews on the yaesu screwdriver antenna even though the 857d has a controller for it all but built in. The next mobile hf radio I got was an alinco nice radio bad tech support.I've looked at the 857d and the new 891 for a while for mobile HF. Not quite ready to pull the trigger on one just yet though. The 2m side band of the 857 keeps it in the lead though. I love my 897, it was a dream radio and I got a nicely optioned specimen reasonably priced from a local who takes very good care of his gear.