If I were you, since you are already playing a quality horn, I would check out a used YSS 62. I've played them, they are cheaper and play better than the old Mark Vl sopranos.

Both those choices seem good.  If it were me, I'd get one in red brass because it would counteract the tendency (IMO) of modern sopranos to sound kind of thin and shrill.  Kessler has a trial/return policy that you might use to help make your decision.  

One sleeper horn that you can pick up in the used market for not too much $ is the Vito Japan soprano.  They were made by Yanagisawa, and Yanis are pretty much the gold standard for sopranos.