Something to keep in mind -
If a string company wants market share, bragging rights, etc. they can offer ridiculously low prices, promo co-op money, priority services, etc. to work with a guitar manufacturer. For a manufacturer this helps to lower the per-unit cost of guitars. Don't automatically assume that strings that "come on a guitar" are necessarily better.
Don't get locked in to anything in aperticular until you find what you like. Learn about how guitar strings are made (core, wrap, material, etc.). Learn what to expect with tone, clarity, durability from any particular set of strings.