Harry's right, the 3mm fullsuit is your best bet. Its only a few more inches of neoprene covering your legs and arms, but you'll be thankful if you ever brush up agains fire coral or swim through hydroids. If you MUST have a shorty and I know people who won't budge on this then the Scubapro or Pinnacle Spirit are great choices especially if you are thinner person. If a little thicker like most Americans, Bare would be a better choice, not as warm as the others, but it is much stretchier and more comfortable. There's a HUGE quality difference between Akona, Scubapro, Pinnacle and Bare. Then thing they're all going to fit and feet a little different and as far a shorties go, they're all about the same price, we at least within $30 of the good quality ones.
Robert