Kracked Skulls decks are super super flexible. I weigh a little under 200 and when I ride mine I feel like its going to bottom out sometimes (it never does though). Honestly its not a particularly refined flex, its not like a proper flex pattern (like on my Original) when the board flexes right where you want it to and nowhere else, its just sort of floppy. Its really bouncy and really fun though, responds well for dancing. I would always recommend KS.
The Scimitar actually also has an extra layer of wood on the tips of the deck (around where the trucks bolt on) to reinforce everything and make it flex a little less. IMO its worth it, but mostly just so you can get BigZigs.
The longer you get your deck, the flexier it will be. I have a 46" so thats the longest you can get.