[trux]

I am afraid you will be too warm in 3mm wetsuit, and that means not only higher heart rate, but also weaker diving response. Personally, I do not need any wetsuit for dynamics at such temperatures, but those who are more sensitive, usually use either a cheap 1 or 2 mm surfing suit with short sleeves and legs, or a 0.5mm or 1mm triathlon or swimming suit with long legs but usually without sleeves. You also get such suits much cheaper - you can find a shorty below 20€, and a long leg suit for some 60€.