Hey Vince, I'm around 180 and switch between a 4'2" and 4'6" Walker Project. I love those boards, but I'll be truthful with you...if you're just starting out at your size, you won't like any of Mike's shapes. Don't get me wrong, Mike's boards, IMO are the best surf style available, BUT they are high end and require considerable experience for big guys. KIDS, in the 80-100 pound range will love 'em
If I may, instead of the stixxstreme, check out Jerry's JaMako or Blowfish. Both of those boards are better suited to bigger guys just getting started. What you'll find, no doubt, is that after you get the muscle memory worked out, you can step down in size. I would REALLY encourage you to get a bit larger board than you need to get started on.
The Xtreme Board Company's Long Board would no doubt work for you. One thing I know I have found with the single to double concave bottom design, popular on shortboards, is that it becomes a bit "sticky" for big guys.
Another good board for starting out is Inland's Red Tide. That is a BIG BOARD, designed for newbies. You'd be able to surf that no problem.
The 5'6" Shoreline would be a good choice. I prefer the Future's fin boxes on the Stixx, to the FCS on Shorelines...but that is really splitting hairs.