x2 on amping them as you add sub woofers in the future you will notice that bass will over ride your mids & highs and most of us amp our mids & highs sounds louder and better sq.
IMO if ur gonna upgrade ur speakers sooner or later why not just amp them and see how they take it and later on just get a good set of components but you do get alot better sound quality and louder if u amp them because u have a more control of them cuz of the amps crossovers,