Just as a suggestion-
Every year DUI does a Dog Rally and they bring out all there Drysuits and you can try things on to your hearts content.
I attended one a few years ago and it was a blast.
They attached a drysuit hose to my 1st stage and held my dive card and a credit card.
Then you can pick and choose underwear, a suit, rock boots and accessories.
As mentioned before it was a fun time for all.
We did two dives and tried on a few different things.
I found that the event made it much easier for me to understand what people were talking about and to decide what kind of suit that I wanted.
Website-
http://www.dui-online.com/dog_events_06.html
Andrew