My Rav4 came from the factory with an H5. However the tray had room and the extra screw down hole for the bottom clamp for a H6 - which is 1.4 inches longer. You might want to check the tray to see if yours is the same? H6 is larger, the same price at Walmart, and seemingly more readily available.
I went with the Everstart non AGM 3 year from Walmart. To be honest not particularly happy with it. Its already showing 70% State of health from my tester. The car is not short tripped, and I put the thing on my noco trickle charger every month or so. Its likely the same JCI battery you get at any of these places, and unfortunately I can't find a Deka around here.