I believe he's looking for recommendations as to what batteries he should replace his current ones with. To the OP, if your current setup works for you as is, I'd just replace the old ones with the same size/style of new ones. I bought my boat back in October of 2021, ran the batteries that came with the boat (both cranking/starting batteries) just fine for two seasons before pulling the boat out of the water in the late fall/early winter of 2023. When I pulled the boat out of the water, she wouldn't start, nor did the batteries have date codes/stickers on them, so I figured it was time to replace them. Called up my local Grady White dealership and asked what they recommended replacing them with, of which they said to just replace the old ones with the same size/style of new ones. As mentioned above, the old ones were both cranking/starting batteries and they were both group 24's, of which I got two Interstate brand 24M-XHD batteries and haven't had any problems since then. That being said, besides basic electronics like my Garmin 943xsv, a radio, downriggers and a few other things, I don't run as much electronics as you do, nor do I have a radar on my boat. You could likely jump up a size if you can fit them in the battery boxes, though the 24's for me were a bit of a tight squeeze. Might be able to separate the batteries out and run one on each side, as I believe mine are both on the port side of the boat... not sure how yours are setup. If no one else responds to you on here, I'd recommend a quick call to your local Grady White dealership and see what they have to say on the matter. Good luck!