The Signature arm is, in my opinion, worth the money. You've already gotten the ring clamp, now you might as well hear what your table and cartridge can really do. I recommend using Mapleshade Nanomounts also, and since you will have to do your set-up again anyway, it would be a great time to do it. I am getting superb results with my Sig. Scout and Dynavector XX2MKII Cartridge. Try it, I think you'll like it!
Best,
Dan
Best,
Dan