| Haven't used a light Cannon, although have seen one in the water and was impressed.
I can't think why you should need to change your bc at this stage, stick to what you are used while you are getting used to the drysuit etc and then see how you feel.
The Flexia is a nice suit, I bought one a couple of months back. The boots are neoprene lined so you don't need as much insulation there as elsewhere in the suit. I found it comfortable enough with thin socks for a 6 degree dive in guidy, but when I went deeper I found the neoprene compressed giving causing my foot to come out of the boot. I bought some neoprene socks that do the trick, their main role is to wedge the boot on rather than provide warmth. Once again, it might be worth waiting until you get the suit and then trying it with a couple of different thicknesses of socks etc until you know what you need.
Have fun
Conor |