Hey Mike
I reckon for the bay you've gotta get youself a race or touring board.
You will see guys blasting past on them and you will want to be a part of it!
I got myself one of these a little while back.....I'm a similar weight to you.
www.seabreeze.com.au/forums/Stand-Up-Paddle/Review/2012-Walk-On-Water-126-x-28-BOP-Race/Couldn't be happier with it!!
Charges on flat water.
Did a down wind run on Saturday and it went unreal.
Surfed it this morning in beautiful 2-3' offshore waves down in Westernport....so much fun I couldn't wipe the smile off my face....and I had a 9'0" & 8'8" surfing SUP in the car that didn't get riden.
It's great fun throwing these big boards around on a wave.
Check out the image near the end of the thread I've given you the link to...its 30" wide and very stable.....great first board....IMHO.
RPS in Elwood should have these in stock very soon.
Get into it....great fun and a great way to keep fit!!
It's also not a bad idea to demo a few different boards to get a bit of a feel for what you might want.
Cheers
Dean