I currently have a UHF 450-470 MHz beam antenna; I think it has 6 elements. I would guess the gain is probably around 7-8 db. I'm considering purchasing a Maxrad 12-element beam which has 12.25 db of gain. I do a ton of searching in the 450-470 range for business-band trunked systems and can hear some towers from many miles away. I'm curious if it would be worthwhile to upgrade to the higher gain antenna or if those few db gain wouldn't really make much difference. For example, suppose I'm listening to a tower 100 miles away that has mostly garbled digital audio. Would those extra few db gain possibly make the signal intelligible? I'm also currently using a GRE preamp and am also considering a Stridesberg active multicoupler with a preamp. Thanks for any input.