Hi
I was with a friend at CBYC last week, and saw a Southerly on one of the first pontoons. Unsure of the size, looked like one of the new models.
It would be worth going down to Northshore and seeing the range.
Never sailed on one but i know they have a reputation as a high quality boat.They have a cast iron ballast shoe that forms the lifting keel case and covers a big area of the bottom of the boat so ideal for drying out on.