I Have used Signature several times, they mounted my Desert Bighorn, my 30" muley, and my Antelope, they also did my Hunting Partners Sheep and Antelope. I think they do terrific work, are competetive priced and usually get shoulder mounts out in about 5 to 6 months, which is faster than any other Taxidermist I know of.
Best of Luck, Kim
BS Hunting Club Co-founder