I've never shot a Shadow but I do have a Lite Storm solo. You've made a great choice. IMO, Merlin provides the most craftsmanship and attention to detail of any bow maker on the market and for competitive prices. Their customer support sets the standard for the industry.
Not sure of the performance specs of the Shadow, it's not on thier web site any more. Based on what you were shooting before you may or may not be impressed by the bow's performance.

Rick