I have an Elecraft Kat500 tuner that has 3 antenna ports. I have a multiband wire antenna, 10m beam (soon to be replaced by a tri-band 3 element Mosely antenna), and a dummy load hooked to the tuner.
I use an Alpha Delta 2 port switch for my 2 Kenwood radios and feed that into my HF amp. This lets both radio's use the same amp.
The RF out from the amp then goes to an Alpha delta 4 port switch. The other 3 ports on the Alpha delta switch are for my President HR2600 and a Galaxy CB radio.
The common out from the 4 port switch feeds my external SWR/power meter before going into the tuner.
This setup lets each radio utilize the SWR meter, tuner, 2 antennas, and dummy load connected to the Elecraft tuner.
The tuner has remote computer control software so I can fully setup the tuner for complete tuning control, auto band select for each antenna, and more!