Re: What should my next board be?
Its really going to come down to your assessment of your current skill level, how often you will surf and how much frustration you can handle!
Obviously the longer/wider the board the relatively easier it will be. I wouldn't discount the minimal shape (wide nose, straight rails), say 7ft2-7ft6, potentially with a narrower tail (have a look at the Takayama scorpion - its probably the most extreme). This type of board will easily be suitable for at least 12 months - not a shortboard, but good paddling and still capable of a lot of manouvering etc.
Otherwise the larger hybrid. The two I mentioned before get a look of good reviews including from beginners/intermediates up to around your weight. They are big and thick and probably not easily duckdivable, but if you can duckdive easily the board is probably too small.
I do make the usual comment that its better to go too big than go too small at this stage - too small will just mean months of struggling and frustration, while too big just means you catch more waves...