I'm thinking about getting a Doug Ritter Griptilian folder and noticed there are many different types of steel used for them. REI is currently selling one now http://www.rei.com/online/store/ProductDisplay?storeId=8000&catalogId=40000008000&productId=48020301&parent_category_rn=4500581&vcat=REI_SEARCHand I'm thinking of using my dividend refund to apply towards it. Should I get the 154 or one with D2 or Sv30 steel?