Back to the original post, the new Trojan AGM batteries mentioned haven't been out long enough to where there is good long term usage data. Unfortunately, even with the batteries that have been around a long time, real data is hard to come by, and peoples perceptions tend to be pretty poor quite often when compared to actual data collection. If you try to get data from forums where it is impression based on things like gas mileage, solar output, battery life, etc. you'll find it's all over the place.
Personally I'd go with the Trojans due to the significant cost difference, but that's based on a guess as to long term performance vs real data. Having done a lot of capacity testing and data collection on the concord aircraft batteries, I most definitely wouldn't recommend them. The government might be able to replace a battery every two years but I need to get a little more use out of mine.