Cool,
So you want a 135 pretty much...
I cant rate the Underground FLX 135 more highly, I went down to a 132 this year (I weigh 75kgs), and i'm going back to a 135 in a few weeks because I want a bit more surface area for riding with Bindings.
For Mackay conditions the FLX will soak up the chop due to its complex bottom shape - but it's also got a flat rockerline so you will be able to keep riding through the lulls despite it being smaller than what your used to. Plus its bright Red so it looks good

If your after a crisper ride but willing to spend an extra $100, go for the Nobile 555 in a 136 (i think) They have done the new asymmetrical toe-side this year and it works really well. Plus its a heap lighter than a lot of boards and has a killer footpad/strap setup.
For flat water my choice would be the 555... For Chop i'd take the FLX