Well, I knew I would get "somewhat trashed" for running wet cell batteries, and I knew I would also take a hit for changing two of them.
My rationale was that since the previous owner had only changed the battereis one time (June 06) and had never had a problem other than routine maintenance, the setup must not be that bad. If I thought the batteries caused my inverter and 300 amp fuse to go bad (I doubt this), I wouldn't hesitate to go a different direction.
I do very little dry camping, so I will probably maintain my current setup until the other four batteries reach 5 years old (or die), and at that time, I will decide if I need to change to AGMs. My last two RVs had AGMs and two out of the 6 in each coach died prematurely. Maybe I have a "2-bad" battery syndrone!
I understand the benefits and drawbacks of AGMs, and if my batteries were located in a difficult place to access, that in itself would be enough incentive for me to change to sealed batteries. My main reasons for the initial post was to warn others not to overfill their batteries and to provide a good source for the 300 amp fuse. I must be "nuts", I could have just said, "I changed my inverter and all is well." But since I haven't installed the inverter, fuse or batteries yet, you may hear from me again on this issue.