Agree with that. I am at 145lbs and traded up from the 155 Cobra to the 158 because I ride a lot of pow and the 155 simply did not have enough float (the spading actually does not really help in pow, but the longer nose does a bit - in fact, it should be drawn out even more gradually IMO).
Like BigMountain, I disagree with your points about needing a wide boards - see my other post.
Fair enough, everyone has opinions. I'm betting you have a lot more experience on different boards than I do, based on other informative posts you out up.
Still feel a 164 non-wide won't be floaty at all with a 275 lb rider. Your 155 on a 158, I'm 195 on a 161. He needs bigger than 164 I think. Wide adds area, which will definitely help float. Not out of the question to ride a wide with 11.5 feet. Also a good point someone made about "small" feet relative to weight making this a little tougher to choose. Going from 255 to 269 waist only adds about 1/2"...
I had a premier F1 and while it carved on rails, it was fairly slow edge to edge. Took a lot of input to get it to change direction, which is exactly why it held lines well, but it's not what he's looking for.
Maybe a raptor 169? Haven't been on one but people who have say it's quick edge to edge, the length is better for his weight, as is the extra stiffness. Hmmm.