After doing a bunch of research and getting some advice here I have decided to pull the trigger on a new pair of 2013 Blizzard Bonafides. I currently own 2010 Line Prophet 100's in 172 and a pair of 2012 Line Influence in 179. I am 5' 6" and weigh 165, I am an expert skier and will be using the Bonafides in Michigan and when I take trips out west 6-10 days a year. When in Michigan I mostly just ski bumps or I get bored. When out west I ski steeps with bumps mostly. Now between my 2 pair of lines I much prefer the Influence 105's in 179. I just feel they are way more stable and I like the way they ski. However that might just be because the style of ski it is. I am pretty sure I am going to get the Bonafides in 180 but my local shop also has a pair in 173's. What do you guys suggest? If I could demo both sizes I would but am not going to have that luxury. The guy at the shop told me the 180's would be what I should go with unless I am going to be skiing zippered bump lines which I don't really need to use the Bones on because that is what I use my Prophet 100's for. Let me know what you guys think.