Zebra strings have a pretty bad reputation for creep so I would not recommend them. they are, for the money, one of the worst string sets you can buy. Marketed by Mathews so what would you expect.

There is also no need to spend $100 for Winner's Choice. The markup is horrendous. Any shop is going to recommend those which make them the most profit.

There are many good choices to be had for between $50 and $75 (approximate). MeanV here on this site handles Vapor Trail. John Mraz makes Bucknasty strings. Both very good quality.

On another site, Archery Talk to be specific, there are many string makers listed in the classifieds. H&M is one that I've recommended to several people and they have been pleased with that product. On the Martin Tech Forum there is Hutch-n-Son Archery that makes a good string set for about $55 or so.

You could order from any of these and just have your shop install them. Off hand I'd say that $30 to install, set up, and retune the bow is a reasonable charge.