Ok, I have a kenwood TM-D710 and a Diamond CR73B-NMO antenna, while the antenna works ok, I need it to work a little better. I am losing my local 2M repeater for the last 5 minutes or so of my communte. The CR73B-NMO has a gain of 2.15db on 2M and 5.3db on 70cm. I am not sure what it is in refrence to, dbI, dbd, db-whatever.... I am looking at two possible replacements from Comet. The first is the CSB-790A gain of 5.1db and 7.7db. the second choice is the CA2x4SR-NMO, gain of 3.8db and 6.2db. While the 790A has more gain, it is also over 5' tall, 62". My current CR73B is only 34" and the CA2x4SR is about 40". Is the extra 22" worth it? Are there other choices?