For Me, I can convert the NMO mount for ph or even GPS use, when I pull the radio and sell or trade in the car/truck. People don't mind when you tell them its a cell ph antenna mount
RG58 10.6db / 100 = .106 x 12' = 1.272 drop
LMR-240 5.3db / 100 = .030 x 12' = .636 drop
Did the math and its .6 db drop differance at 450Mhz.
KOBG you have a nice web page for HF setups
The web site I linked, has a 10' LMR-240 cable with your choice of connectors on each end for $12.50
I found an 8' RG58 for 9.99 on a different site. So the cost is not a big factor.