RE: What Battery Charger to Purchase??
Battery charger choice is largely a personal preference one. It's going to depend on what you want to charge, what you think you might want to charge in the future, and how much you want to spend.
Is the Hobbico AccuCycle Elite the one you're looking at? The main advantage to this charger is the fact that it comes with an AC power supply, and I suppose that a charger with similar functionality and a AC power supply would run you about the same.
Be aware that this charger has a fairly limited capacity. It will be fine for small park fliers, but you may find the wait times for larger planes (hours) to be unacceptable.