Though its been yaers since I wieghed myself, I'd prolly go 310 myself and have a few inches on ya heightwise too?
I wear Columbia's size XXL and fish about on average 1 day a week every week of the year. I've been happy with them as they're very inexpensive (maybe $60.00 to 80.00 bucks?). They've never leaked and I treat them pretty rough too.
They're not the prettiest for sure, but I dont care; I'm there to fish.
You'll need to buy a belt for them though as it keeps them from bagging up, and you from drowning if you go in. Of course I've yet to fish a river I couldn't just right myself and standup?
There's only one small pocket for maybe a set of keys and license, and nowehere for lfies, but I wear lanyards or SIMMS jackets mostly anyway; so not a big deal.
I will admit though, if I had the extra coin I'd probably do the SIMMS Custom route, just because they might be a bit better in Winter than what I have, and I could stay out longer in rough weather; also wouldn't need extra belt I sometimes forget?
They will cost you about $400.00+ though with all the bells and whistles and custom stuff I'd guess (booty size+)? I could be a little off, but I think I'm close.
Hope that helps?