Short answer - I would get the group 24 or 27 flooded battery if you see no dry camping in the future.
Longer answer - As a rule when comparing two group 24's or two group 27's, you will want to buy the one with the most amp hours or highest Reserve Capacity you can get. The higher RC; the more it costs, however.
If the price is not too different between a 24 and 27, see if you can fit a Group 27 as they aren't much bigger but have roughly 15% more capacity, which is nice if needed.
DW, 3 Kids and our Goldens
2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD