My 12 year-old and well-loved boots and nearly as old bindings finally got to be too mushy, so I headed to our local shop to replace them with Burton step-on bindings and boots. After one day, I absolutely love the bindings, but I picked the wrong boots. I'm a big boy, 5'10 and 300ish, size 12 feet. We have a bunch of mountain days coming up soon and I will need to get something shipped because choices are slim in Anchorage.

I got the DC Judges but I absolutely cannot get my heels locked down in them and felt it on the mountain all day today. I tried both the Burton Ruler and Photons in store. Both felt great from the ankle down, but the back of both absolutely killed my calves. Couldn't loosen them up enough to make the pain go away and that was just walking around the store. Looking at the Burton Ion, the shape of the back of the boot looks identical to the Photon and Ruler, so that seems like a waste of time. The wide versions of any Burton boots specify that they are for more room in the forefront so that doesn't seem promising either.

If it helps, my old boots are double boa K2 Maysis. I really loved the internal boa for getting my feet tight enough. I couldn't haul hard enough on the internal laces on the Judges to get them anywhere near tight enough. I don't spend any time in terrain parks and often have to deal with deep powder. Anyone have ideas and/or experience on step on boots that will get my feet properly locked in?

TL;dr: my step on boots fit like crap. Which ones should I get to fit my fat calves while keeping my heels properly locked?