Battery replacement

[OneMoBear]

So, let me start by saying we have printed and read the 12 volt side of life, in addition to many posts here and owned our Bounder for 8 years before switching to our TM so we are fairly up on this subject but . . .

We have talked about going to a couple of 6 volt batteries but just don't know that we need to do that. We will be spending a week at the beach in February without hookups. We will have some solar and have a Honda generator and a good battery charger. I just can't believe that between the three we can't keep the battery charged. We're thinking about this Die Hard: http://www.sears.com/shc/s/p_10153_1...atteries#specs

So, finally my question is, with a 3 year free replacement warranty, what is the downside to going with this?

Thanks in advance! Malinda