I would think it would be OK. Many on this fourm think stainless pipe is no good however, my 6" metalbestos chimney is about 20 years old and is about ready to be replaced. It has always vented either wood exhaust or soft coal exhaust so I cannot say it will last if its venting anthracite exhaust.
Wood and soft coal both deposit a somewhat oily substance on the inside of the flue so this might be the reason my chimney has lasted.
My preference would be to go straight up through the ceiling that way you only have one penatration of the house and if the stove is ever replaced in the future it will be easier to hook another stove up, even if its a top venting stove.
Also dont forget to install guy wires or the roof braces sense there will be so much pipe above the roof. I have seen them get messed up by the wind.