I have the Helly Hanson one-piece suit. I went with a one piece mainly because I had 2 piece snowmobile suits before and didn't like the cold air and snow going up my back when i laid around or got playful with the kids. It floats, keeps me warm enough sitting in -20 temps all day on a pail. I do wear a one piece long underwear that are 50 percent polyester, 25 percent wool, and 25 percent cotton, which helps. I always like to go with one piece everything, because being a tall guy, i find when I bend over to skim a hole, my shirts no matter how long they are lift up and untuck exposing my back to colder air, even inside a suit! With the proper under clothing this suit will be plenty warm enough for you! Another bonus, although the suit is orange the knees and butt have the material in black so they don't look filthy after being knelt on or sat on a thousand times! It has great pockets, one inside up top for something like a cell, a urinating zipper, emergency whistle in a sleeve pocket, a decent hood, velcro cinches around wrist and ankles, a handle strap behind the neck for pulling someone from the water, (like some else mentioned) inside suspenders, and probably a few other things I'm forgetting right now! I think the suit went for around $285 at Lebarons. I know it was the cheapest price of anywhere in North America! The day I bought the 2 suits and a bunch of tackle at Lebaron's, I also saved a couple hundred dollars by buying the $25 membership card! They let me use it the same day, for the discount!!
The only downside to the suit is that it is HEAVY! But I look at it as a positive. I really get a work out when walking thru 3 foot drifts dragging an auger and takle!
Hope this helps some!
Good fishin!
Glenn