Need Help Sizing (Mako 2mm)

[ONT]

Hello all, I'm a newbie looking at getting Mako's 1-piece 2mm wetsuit but I need help choosing the right size, because I'm in between their medium and large. I'm between 5' 8" and 5' 9" (though I might have another 1-3 inches left to grow in the next few years) and I'm about 155 lbs with an athletic build, though I might put on a little more weight (muscle) during my swim season, which will be between now and my trip to the Keys next spring

Here's Mako's size chart:

USA---------height------------weight
small-----5'2" to 5'7"--------125-150
med------5'6" to 5'10"-------150-175
large------5'8" to 6'1"--------175-190
xl---------5'10" to 6'3"-------190-215
xxl--------6'0" to 6'6"--------215-240

Is it more important to be in their height or weight suggestions? I really have no idea about this; I'm landlocked, so I have hardly any experience wearing wetsuits...

 

[ONT]

Because I've gotten almost no replies to this, I sent an email to Mako directly and got this response:

Thanks for the email. The 2mm suit will be perfect. I would recommend the medium unless you plan on putting on another 15lbs or so then I would go with the large.

So, for posterity's knowledge, I'm going with the medium.