What bike to buy

Hello,
Looking for some advice for help on what geometry makes sense for my body type. I’m 5’10 and typically ride a very aggressive position on a 52cm frame on my road bikes. I’ve been told to look for a bigger frame in a Triathlon bike. I’ll be doing Oceanside 70.3. I’m an experienced endurance athlete with multiple 30+ hour weeks under my belt but I’m new to triathlon. Any advice would be greatly appreciated. Cheers

Most riders I work with who fit your size and description land on 54s. 52 in QR. Also, you’ll get way better response in the main forum. Technically this isn’t the place for these questions.