Performer 5000 mobile antenna mag mount by Sirio

Sirio has a good reputation. I will probably give them a try next time I need an antenna. I do know personally those who have run them and they work well.

 

Let us know how you like it.

 

I have heard that it has a slightly higher Q than the comparable Wilson 5000 which would make it a slightly more efficient antenna but I doubt you would notice much of a difference.
Antennas with a high Q are narrowband, antennas with a low Q are wideband. The higher the value of Q, the more sensitive the input impedance is to small changes in frequency.
A narrow banded antenna should always outperform a wide banded antenna at the center frequency

 

The only difference you might experience is a transmitting difference. I don't think a four inch difference in the antenna length will have hardly any effect on what you hear.