A tennis friend and I are planning to go together and buy an entry-level, inexpensive stringer to do some experimenting with. We want to try out lots of poly hybrids, etc. One point that seems to come up a lot is that 2-point stringers aren't very good, and one should really use a 6-point stringer. Do all 6-point stringers start at $375-$400? Are all the 2-point stringers just junk, which we will quickly find frustrating?