Getting back on topic, today I put a Sirio P5000 on an existing Wilson 5000 magmount, trunk mounted on a Dodge sedan. Out of the box the Sirio had SWR measurements under 1.2 on ch.1, 20, and 40. Also noted was a major decrease in background noise, even with the engine OFF. I always had a slight amount of noise coming in through the antenna with the Wilson that the NB/ANL wouldn't eliminate. With the Sirio 5000, that noise is gone. I haven't had the opportunity to do any seat of the pants, non-scientific transmit comparisons between the two as yet, but so far I'm pleased with the P5000's performance. My $.02, FWIW.
I am with you. I am convinced I can hear further with my Siro than My Wilson but again I had a Wilson 1000 so maybe it wan't a fair test.
I am still well pleased with my Siro ...