Armia was a favourite of mine last year and I don't think they made a bad choice. It might not be a perfect one but Armia a potential stud. The guy is slick. And the addition of Hodgson makes the need for a center less of a need.
Unfortunately for you, Miller has done his best to relegate Buffalo to another middling performance, losing the shot at a top pick and with it one of those guys you want.
I think you best shot is Gaunce or Girgensons. Both are big centers. People really aren't sure about Gaunce's offensive upside. It could be great, it could be just 3rd line center kind stuff. He's sort of like Colborne in that regards. Girgensons could be an interesting pick. He was a guy that had a lot fans early on but sort went under the radar while a guy like Faksa has rocketed up and stolen some of his thunder. He could be a nice pick by the Sabres if they slip out of the top ten.
If you get lucky and have Nashville fall out in the first round, you should try and snag Maatta. Solid top 4 guy I think, one with some good size, and good all around skill. Likely won't be anything spectacular but just a solid all around guy. Otherwise go after a guy like Wilson or Frk in the 20ish range.