Ok, I ride all of my boards long.
I weigh around 180-200 usually but my diet slipped and I've dropped down to 165.
However, I'm a firm believer in riding boards slightly longer than what the new weight to length scales recommend.
My play board is a 59, my big boy board is a 63. Both wides as I have large feet, so I get even more surface area.
Here's the thing, you WILL adjust to having a slightly longer board and you WILL be able to make it do everything people on smaller boards are doing. It will take more effort, and a little more time to adjust, but in turn you will become a better rider imo.
On the flip side, your buddies may be downsizing as far as they can go, and they will pay for it on powder days.
If you're wanting to be as close to a one stick quiver guy as possible, get the slightly to long board and adjust to it.
With that being said, and your options being a 58 and a 61, I think you should go with the 58 unless you plan on gaining some weight.
The 58 is already pushing the longer side for your overall size and the 61 may be a bit goofy.
And about waist width, you DO NOT need a 263 waist width with size 10.5 stompers. My feet are much bigger than yours and I go with a 260 and up, unless you're some mega carver and touch your nose to the snow mid carve.
The 58 will be a perfect do everything size for you imo.
"When I do good, I feel good; when I do bad, I feel bad. That’s my religion." - Abraham Lincoln
Moral of the story: If your going to rob people, wear a diaper.