I know you're looking for an easy answer here but unfortunately there is no "best board" for any person or situation. If you can get to a demo day at a local hill that would be my best piece of advice.
Otherwise, stay in the mid-range of most product lines and you'll end up with a good setup. My girlfriend started with a K2 Luna, K2 Bliss bindings, and Burton Sapphire boots. Those are all mid-range, all-mountain style items. You don't want to limit yourself by buying the extreme of any spectrum (ie. stiffness, camber profile, etc. etc.)
A lot of boot companies these days are trying hard to reduce the overall length of a given sized boot. When picking your first setup, buy the boots FIRST. Try on a ton of options and don't even worry about price until you start feeling what a truly proper fit feels like. It should be tight, not have much heel lift, but also not make your feet go numb. It's a fine line to walk.
Once you have boots then you can find a board/binding combo wide enough to match. Generally if you're buying a bigger board to handle the weight, they'll already be wide enough for the feet to go with the body lol. I think you would want something around 260mm+ in width, but again nothing beats mounting the bindings to the board, putting the boots in the bindings, and rocking that thing back and forth on a table to see where your toes/heels would start to dig in. In this dry test my board gets to about a 60-70 degree angle before they touch.