In that case, Shadowfang easily. IF you're a raider unless it's something really rare, I'd say get the item for your main. At least that's what I'd do.
Sometimes main sometimes twink, I find twinks are a great break from your main, my twink becomes my main for a month or so and then I will go back to my 80 main. Just a recurring cycle . But I usualy end up buying things for my twink rather than my main, BoE main gear seems lame to me