I assume you want this for the bridge position. In that case an A5 would be a good choice. If you plan on splitting it, an A8 would be a better choice. If you're using it in the neck, an A5, A4, or even an A3 would be a good choice. I personally like A2 in the neck but I'm nearly alone in this (I think Mincer also likes A2 in the neck).